Year	Number
1994	27.23639
1996	23.51172
1999	35.9339
2000	34.90116
2001	38.89666
2002	35.28189
2003	35.37039
2004	35.54382
2005	31.39266
2006	33.04599
2007	33.19098
2008	32.71231
2009	33.57823
2011	32.59743
2012	32.93779
2013	32.02908
2014	29.64376