Year	Number
1992	132.04468085539838
1993	131.0212891643781
1994	126.15137288921561
1995	120.36502599207112
1996	116.20636987542353
1997	111.09466879056447
1998	108.74726677360427
1999	105.48659921650192
2000	103.98101165940768
2001	106.14965016604008
2002	104.38810559165996
2003	102.86174468330428
2004	99.74773847994544
2005	97.09465686857112
2006	95.61425467451447
2007	95.21530586629115
2008	102.29013663072534