Year	Percent
1950	9.45185
1955	9.46963
1960	9.09766
1965	9.84012
1970	11.4853
1975	11.96005
1980	11.82632
1985	13.02442
1990	11.59878
1995	10.74551
2000	9.22716
2005	9.40852
2010	11.00843
2015	10.68017
2020	9.55903
2025	8.45832
2030	8.43399
2035	8.38151
2040	8.10325
2045	7.73728
2050	7.36056
2055	7.03418
2060	6.79384
2065	6.58433
2070	6.37491
2075	6.16027
2080	5.9802
2085	5.8324
2090	5.7145
2095	5.61984
2100	5.53085