Appendix D "Sierra County, Mountain Counties" Table D-23 Parameter 1980 1985 1990 1995 2000 2005 2010 2015 2020 Population 3100 3200 3320 3560 3600 3700 3800 3800 3800 Avg. Daily VMT/1000 68 77 100 92 99 109 122 130 136