Year	Number
1992	436.70818280574997
1993	415.20998325564557
1994	456.1819883147709
1995	463.9224297337278
1996	465.30821282906936
1997	467.9052945390677
1998	475.31236808780073
1999	475.2029087497068
2000	490.6953476738369
2001	514.7324866243313
2002	536.8648948967317
2003	558.8777836691411
2004	563.2291111902092
2005	584.4873250094589
2006	619.6344976869074
2007	658.4994194736133