Year	Number
1993	252.0108043217287
1994	256.3310220078384
1995	260.7724931838837
1996	260.9763586122198
1997	258.46153846153845
1998	254.52315240723706
1999	243.56265356265357
2000	298.2300339192106
2001	292.88627935723116
2002	292.47445029420874
2003	284.3561898852001
2004	277.82960199004975
2005	271.23402929261454
2006	266.789506558401
2007	262.32550860719874