Year	Number
1995	12.419974993840896
1996	7.536445636582723
1997	3.018510379284597
1998	11.984858340357109
1999	17.052130694555533
2000	27.594426162558165
2001	22.26382407863932
2002	36.290732780062434
2003	51.474466727515484
2004	41.1505298109353
2005	50.802349983464836
2006	63.653334889541746
2007	51.918013923841734
2008	34.80224727435093
2009	25.065588186223334
2010	22.846509085326538
2011	25.9198540763696
2012	25.757955890282503
2013	29.8705576611857
2014	29.633194162498167