Mercer County (MER)
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Wyoming
York
| Year |
Total stations |
Mobiles | Portables | Rovers |
% of grand total |
County total |
| 1987 | 21 | 8 | 0 | 0 | 8.26% | 915,220 |
| 1988 | 17 | 4 | 0 | 0 | 3.62% | 383,521 |
| 1989 | 4 | 1 | 0 | 0 | 2.22% | 218,115 |
| 1990 | 19 | 1 | 0 | 0 | 7.56% | 970,965 |
| 1991 | 4 | 3 | 0 | 0 | 0.02% | 1,911 |
| 1992 | 8 | 2 | 0 | 0 | 0.80% | 85,368 |
| 1993 | 1 | 1 | 0 | 0 | 0.01% | 590 |
| 1994 | 4 | 2 | 1 | 0 | 1.38% | 192,298 |
| 1995 | 9 | 3 | 1 | 0 | 0.42% | 59,918 |
| 1996 | 3 | 0 | 1 | 0 | 0.11% | 15,935 |
| 1997 | 10 | 4 | 1 | 0 | 1.07% | 148,577 |
| 1998 | 6 | 2 | 0 | 1 | 0.23% | 38,211 |
| 1999 | 7 | 3 | 1 | 1 | 0.58% | 86,162 |
| 2000 | 9 | 4 | 1 | 0 | 1.34% | 196,761 |
| 2001 | 6 | 4 | 0 | 0 | 0.55% | 85,865 |
| 2002 | 5 | 2 | 0 | 1 | 0.60% | 105,857 |
| 2003 | 7 | 3 | 1 | 1 | 0.81% | 113,838 |
| 2004 | 7 | 4 | 0 | 0 | 0.72% | 83,420 |
| 2005 | 4 | 1 | 0 | 0 | 1.10% | 141,701 |
| 2006 | 3 | 3 | 0 | 0 | 0.16% | 17,698 |
| 2007 | 4 | 2 | 1 | 1 | 0.39% | 40,186 |