Year	Number
1995	15.9686
1996	13.39494
1999	12.57887
2000	12.79928
2001	13.23314
2002	13.22446
2003	14.5393
2004	14.38266
2009	8.29902
2010	8.82194
2016	12.63283
2017	13.26065
2018	13.44803