Year | AK ID MT OR WA (Total) ----- | -------- -------- -------- -------- -------- -------- 1967 | 0 0 0 0 1 1 1970 | 0 0 0 0 2 2 1972 | 0 0 0 1 0 1 1973 | 1 0 1 1 4 7 1974 | 0 0 0 0 2 2 1975 | 0 0 0 2 4 6 1976 | 0 0 1 3 9 13 1977 | 1 0 0 1 5 7 1978 | 1 0 0 7 7 15 1979 | 0 2 0 10 12 24 1980 | 0 3 2 25 29 59 1981 | 8 12 37 67 81 205 1982 | 5 15 22 68 77 187 1983 | 5 20 18 67 87 197 1984 | 9 20 41 59 129 258 1985 | 3 22 32 88 178 323 1986 | 20 27 28 102 167 344 1987 | 11 40 31 108 167 357 1988 | 12 39 43 134 230 458 1989 | 26 47 59 163 255 550 1990 | 14 55 57 166 311 603 1991 | 18 49 65 193 330 655 1992 | 17 56 69 215 364 721 1993 | 19 64 64 237 381 765 1994 | 27 87 69 246 426 855 1995 | 36 77 88 275 449 925 1996 | 33 81 69 282 465 930 1997 | 46 118 73 316 501 1054 1998 | 34 109 86 318 536 1083 1999 | 42 123 97 348 610 1220 2000 | 43 135 74 353 651 1256 2001 | 50 140 126 387 674 1377Source of Information: Network Data System and SIMS, February 2002