Year	Number
1992	295.5974842767295
1993	251.57232704402514
1994	228.9308176100629
1995	215.3047989623865
1996	212.54801536491675
1997	152.86624203821657
1998	217.6767676767677
1999	229.70886075949366
2000	216.88524590163937
2001	224.37735849056602
2002	273.59198998748434
2003	230.6733167082294
2004	333.98230088495575
2005	374.468085106383
2006	432.9004329004329
2007	593.9524838012959