Year	Percent
1950	9.97113
1955	9.16364
1960	8.46151
1965	9.43186
1970	10.81174
1975	12.11241
1980	12.44702
1985	11.76685
1990	11.19263
1995	10.70095
2000	11.01915
2005	10.56987
2010	10.71895
2015	10.68196
2020	10.01766
2025	8.81168
2030	8.47003
2035	8.39567
2040	8.15649
2045	7.72802
2050	7.25786
2055	6.87623
2060	6.61782
2065	6.43884
2070	6.26338
2075	6.08138
2080	5.89721
2085	5.74933
2090	5.64516
2095	5.56711
2100	5.50285