2002 Almanac (page 484) Table D-45 Sacramento Valley Air Basin - Shasta County: Population and VMT Trends Sacramento Valley Air Basin: Shasta County Surface Area = 3793 square miles Parameter 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Population 122400 123800 125200 127800 131200 133300 136400 140400 144100 151000 156600 159100 160500 161200 161600 161700 162800 163500 163600 165000 Avg. Daily VMT/1000 2214 2190 2386 2595 2805 3019 3192 3448 3672 3901 3940 4018 4068 4029 4006 3982 3888 3899 3994 4068