Year	Percent
1950	11.01908
1955	9.83619
1960	10.83553
1965	12.38753
1970	10.99011
1975	9.93818
1980	10.02763
1985	8.88307
1990	8.4073
1995	8.47043
2000	8.04023
2005	7.44427
2010	6.34262
2015	5.6805
2020	5.23831
2025	5.38249
2030	5.39458
2035	5.25693
2040	5.00126
2045	4.74896
2050	4.63579
2055	4.68017
2060	4.79197
2065	4.85623
2070	4.82276
2075	4.74896
2080	4.71177
2085	4.74702
2090	4.82256
2095	4.86426
2100	4.85384