Year	Percent
1950	12.04924
1955	12.76137
1960	13.29961
1965	11.67518
1970	11.89612
1975	10.83586
1980	10.10509
1985	9.73962
1990	9.17001
1995	8.18327
2000	7.59008
2005	7.48391
2010	6.883
2015	6.25279
2020	5.7751
2025	5.0761
2030	4.83216
2035	4.66272
2040	4.55159
2045	4.39947
2050	4.22311
2055	4.07309
2060	3.98679
2065	3.97598
2070	3.99551
2075	4.00646
2080	4.00025
2085	3.99455
2090	4.00787
2095	4.06296
2100	4.1302