2002 Almanac (page 483) Table D-40 Sacramento Valley Air Basin - Butte County: Population and VMT Trends Sacramento Valley Air Basin: Butte County Surface Area = 1670 square miles Parameter 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Population 152700 156500 159000 161700 165800 168700 172500 177900 181500 187900 191900 194700 196400 198600 200400 200300 202000 202600 203800 205400 Avg. Daily VMT/1000 2517 2591 2771 2963 3230 3380 3640 3931 4145 4395 4378 4319 4415 4476 4536 4420 4266 4300 4411 4496