Year	Number
1992	345.48463356973997
1993	323.3256351039261
1994	314.94252873563215
1995	306.89655172413796
1996	288.88888888888886
1997	279.1208791208791
1998	276.9230769230769
1999	278.06666666666666
2000	291.59999999999997
2001	312.3956043956044
2002	319.5164835164835
2003	312.5054945054945
2004	314.1758241758242
2005	314.967032967033
2006	322.72024729520865
2007	325.59168325591685
2008	327.08703374777974