Appendix D " Basin Total County, Mountain Counties" Table D-15 Parameter 1980 1985 1990 1995 2000 2005 2010 2015 2020 Population 229600 272800 345920 385760 410550 471900 522200 561900 599500 Avg. Daily VMT/1000 5217 6739 9171 10431 11084 13252 15639 17882 20135