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Year Total
stations
Mobiles Portables Rovers % of
grand
total
County
total
1987  10 7 2 0 1.06% 117,366 
1988 6 6 0 0 0.09  9,809
1989 7 6 1 0 0.28% 27,600
1990 7 6 0 0 1.68% 215,427
1991 5 5 0 0 0.03% 3,483
1992 5 4 1 0 0.28% 30,375
1993 2 1 1 0 1.17% 118,359
1994 2 1 1 0 0.36% 49,397
1995 2 1 1 0 0.04% 6,286
1996 2 2 0 0 0.01% 1,348
1997 6 5 0 0 0.71% 99,564
1998 5 3 0 1 0.66% 109,770
1999 9 4 3 1 1.67% 247,626
2000 5 4 0 0 0.89% 130,868
2001 8 4 0 1 1.21% 188,888
2002 8 2 0 1 0.46% 81,188
2003 9 6 1 0 1.01% 141,592
2004 5 4 1 0 0.62% 71,854
2005 3 2 0 1 0.46% 59,291
2006 4 3 0 1 0.46% 50,801
2007 5 3 0 1 0.30% 31,034



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