Year	Percent
1950	15.85041
1955	18.8093
1960	18.93884
1965	19.28118
1970	18.7819
1975	18.71759
1980	18.48905
1985	17.44466
1990	15.55449
1995	13.0229
2000	9.98047
2005	8.99016
2010	10.80466
2015	11.82673
2020	10.23017
2025	8.76474
2030	7.63334
2035	7.07636
2040	6.99849
2045	7.06574
2050	6.94414
2055	6.4994
2060	5.96505
2065	5.61859
2070	5.50282
2075	5.51429
2080	5.50394
2085	5.38702
2090	5.1894
2095	5.00875
2100	4.91628