2002 Almanac (page 485) Table D-48 Sacramento Valley Air Basin - Tehama County: Population and VMT Trends Sacramento Valley Air Basin: Tehama County Surface Area = 2980 square miles Parameter 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Population 41100 42100 43000 43900 45000 45600 46700 47900 49100 51000 52700 53800 54100 54700 55300 55300 55900 56000 56200 56700 Avg. Daily VMT/1000 721 727 788 784 834 985 1060 1166 1249 1305 1315 1295 1328 1315 1312 1274 1209 1227 1260 1279