Year	Percent
1950	14.31694
1955	14.29126
1960	15.72317
1965	15.70321
1970	15.45364
1975	15.38965
1980	16.22569
1985	14.60472
1990	13.13535
1995	12.39566
2000	11.74502
2005	11.15241
2010	10.25528
2015	9.29241
2020	8.80582
2025	8.1569
2030	7.52691
2035	6.94211
2040	6.46206
2045	6.07882
2050	5.78294
2055	5.53061
2060	5.31651
2065	5.11734
2070	4.97084
2075	4.85791
2080	4.78226
2085	4.73092
2090	4.68889
2095	4.65818
2100	4.6325