CENSUS TRANSPORTATION PLANNING PACKAGE (CTPP 2000) Table 1. Profile of Selected 1990 and 2000 Characteristics
Geographic Area: Clinton County, Iowa
Subject	1990 Census		Census 2000		Change 1990 to 2000
	Number	Percent	Number	Percent	Number	Percent
POPULATION
Total population	51,040	100.0	50,149	100.0	-891	-1.7
In households	50,087	98.1	49,131	98.0	-956	-1.9
In group quarters	953	1.9	1,018	2.0	65	6.8
HOUSEHOLD SIZE
Total households	19,869	100.0	20,156	100.0	287	1.4
1-person household	5,008	25.2	5,495	27.3	487	9.7
2-person household	6,677	33.6	7,225	35.8	548	8.2
3-person household	3,215	16.2	3,039	15.1	-176	-5.5
4-person household	3,014	15.2	2,639	13.1	-375	-12.4
5-or-more-person household	1,955	9.8	1,758	8.7	-197	-10.1
Mean number of persons per household	2.52	(X)	2.44	(X)	-0.08	(X)
VEHICLES AVAILABLE1
Total households	19,869	100.0	20,156	100.0	287	1.4
No vehicle available	1,530	7.7	1,491	7.4	-39	-2.5
1 vehicle available	6,545	32.9	6,116	30.3	-429	-6.6
2 vehicles available	7,923	39.9	8,113	40.3	190	2.4
3 vehicles available	2,820	14.2	3,193	15.8	373	13.2
4 vehicles available	813	4.1	927	4.6	114	14.0
5 or more vehicles available	238	1.2	316	1.6	78	32.8
Mean vehicles per household	1.78	(X)	1.85	(X)	0.07	(X)
WORKERS BY SEX1
Workers 16 years and over	22,781	100.0	23,885	100.0	1,104	4.8
Male	12,705	55.8	12,515	52.4	-190	-1.5
Female	10,076	44.2	11,370	47.6	1,294	12.8
MEANS OF TRANSPORTATION TO WORK
Workers 16 years and over	22,781	100.0	23,883	100.0	1,102	4.8
Drove alone	17,650	77.5	19,236	80.5	1,586	9.0
Carpooled	2,534	11.1	2,494	10.4	-40	-1.6
Public transportation (including taxicab)	197	0.9	201	0.8	4	2.0
Bicycle or walked	1,107	4.9	762	3.2	-345	-31.2
Motorcycle or other means	96	0.4	139	0.6	43	44.8
Worked at home	1,197	5.3	1,051	4.4	-146	-12.2
TRAVEL TIME TO WORK
Workers who did not work at home	21,584	100.0	22,832	100.0	1,248	5.8
Less than 5 minutes	1,550	7.2	1,399	6.1	-151	-9.7
5 to 9 minutes	5,045	23.4	4,786	21.0	-259	-5.1
10 to 14 minutes	4,861	22.5	5,099	22.3	238	4.9
15 to 19 minutes	3,267	15.1	3,508	15.4	241	7.4
20 to 29 minutes	2,971	13.8	3,249	14.2	278	9.4
30 to 44 minutes	2,306	10.7	2,789	12.2	483	20.9
45 or more minutes	1,584	7.3	2,002	8.8	418	26.4
Mean travel time to work (minutes)	16.6	(X)	19.6	(X)	3.0	(X)
TIME LEAVING HOME TO GO TO WORK
Workers who did not work at home	21,584	100.0	22,832	100.0	1,248	5.8
5:00 a.m. to 6:59 a.m.	6,084	28.2	6,863	30.1	779	12.8
7:00 a.m. to 7:59 a.m.	6,594	30.6	6,924	30.3	330	5.0
8:00 a.m. to 8:59 a.m.	2,957	13.7	2,501	11.0	-456	-15.4
9:00 a.m. to 9:59 a.m.	663	3.1	692	3.0	29	4.4
10:00 a.m. to 11:59 a.m.	437	2.0	552	2.4	115	26.3
12:00 p.m. to 11:59 p.m.	4,291	19.9	4,466	19.6	175	4.1
12:00 a.m. to 4:59 a.m.	558	2.6	834	3.7	276	49.5
1See the entry for this item in the Technical Notes in the root directory or state subdirectories (filename: tech_notes.txt). (X)Not applicable. Source:U.S. Census Bureau. Census of Population and Housing, 1990 and 2000 long-form (sample) data.

CENSUS TRANSPORTATION PLANNING PACKAGE (CTPP 2000) Table 2. Profile of Selected 2000 Characteristics
Geographic Area: Clinton County, Iowa
Subject	Census 2000
	Number	Percent
POPULATION BY AGE
Total population	50,149	100.0
Under 16 years	11,301	22.5
16 to 20 years	3,491	7.0
21 to 24 years	2,199	4.4
25 to 44 years	13,536	27.0
45 to 64 years	11,706	23.3
65 years and over	7,916	15.8
Mean age (years)	38.0	(X)
HOUSEHOLD INCOME IN 19991
Total households	20,156	100.0
Less than $15,000	3,410	16.9
$15,000 to 19,999	1,512	7.5
$20,000 to 24,999	1,481	7.3
$25,000 to 49,999	6,821	33.8
$50,000 to 74,999	4,469	22.2
$75,000 to 99,999	1,643	8.2
$100,000 or more	820	4.1
Mean household income (dollars)	43,558	(X)
Median household income (dollars)	37,423	(X)
Household Size by Vehicles Available1
Household Size		Mean vehicles per household	Vehicles available
			Total households	No vehicle	1 vehicle	2 vehicles	3 vehicles	4 or more vehicles
Total households		1.85	20,155	1,490	6,115	8,115	3,195	1,245
	Row percent	(X)	100.0	7.4	30.3	40.3	15.9	6.2
	Column percent	(X)	100.0	100.0	100.0	100.0	100.0	100.0
1-person household		1.04	5,495	1,040	3,495	760	150	50
	Row percent	(X)	100.0	18.9	63.6	13.8	2.7	0.9
	Column percent	(X)	27.3	69.8	57.2	9.4	4.7	4.0
2-person household		1.91	7,225	290	1,660	4,055	980	240
	Row percent	(X)	100.0	4.0	23.0	56.1	13.6	3.3
	Column percent	(X)	35.8	19.5	27.1	50.0	30.7	19.3
3-person household		2.29	3,040	80	500	1,305	860	290
	Row percent	(X)	100.0	2.6	16.4	42.9	28.3	9.5
	Column percent	(X)	15.1	5.4	8.2	16.1	26.9	23.3
4-or-more-person household		2.48	4,395	80	460	1,990	1,200	665
	Row percent	(X)	100.0	1.8	10.5	45.3	27.3	15.1
	Column percent	(X)	21.8	5.4	7.5	24.5	37.6	53.4
Means of Transportation to Work by Travel Time to Work1
Means of Transportation		Mean travel time to work (minutes)	Travel time to work
			Workers who did not work at home	Less than 10 minutes	10 to 19 minutes	20 to 29 minutes	30 to 44 minutes	45 or more minutes
Workers who did not work at home		19.6	22,830	6,185	8,605	3,250	2,790	2,000
	Row percent	(X)	100.0	27.1	37.7	14.2	12.2	8.8
	Column percent	(X)	100.0	100.0	100.0	100.0	100.0	100.0
Drove alone		19.6	19,235	5,125	7,325	2,860	2,245	1,680
	Row percent	(X)	100.0	26.6	38.1	14.9	11.7	8.7
	Column percent	(X)	84.3	82.9	85.1	88.0	80.5	84.0
Carpooled		21.0	2,495	510	955	340	465	220
	Row percent	(X)	100.0	20.4	38.3	13.6	18.6	8.8
	Column percent	(X)	10.9	8.2	11.1	10.5	16.7	11.0
Public transportation (including taxicab)		42.4	200	15	55	20	30	80
	Row percent	(X)	100.0	7.5	27.5	10.0	15.0	40.0
	Column percent	(X)	0.9	0.2	0.6	0.6	1.1	4.0
Bicycle or walked		7.9	760	495	210	20	30	4
	Row percent	(X)	100.0	65.1	27.6	2.6	3.9	0.5
	Column percent	(X)	3.3	8.0	2.4	0.6	1.1	0.2
Motorcycle or other means		23.5	140	40	55	4	25	15
	Row percent	(X)	100.0	28.6	39.3	2.9	17.9	10.7
	Column percent	(X)	0.6	0.6	0.6	0.1	0.9	0.8
1See the entry for this item in the Technical Notes in the root directory or state subdirectories (filename: tech_notes.txt). (X)Not applicable. Source:U.S. Census Bureau. Census of Population and Housing, 1990 and 2000 long-form (sample) data.