Year	Number
1994	36.94502
1996	38.96016
1997	37.77864
2000	35.64983
2001	35.49999
2002	35.74999
2004	37.2
2009	29.74719
2010	31.06842
2011	32.88032
2013	29.76622
2014	30.45495
2015	30.45146
2016	26.9604
2017	25.85525
2018	24.92784