Year	Percent
1950	10.70124
1955	11.23876
1960	14.50645
1965	14.44215
1970	14.03482
1975	13.0264
1980	12.64296
1985	11.85649
1990	10.98276
1995	9.9836
2000	9.2431
2005	9.6751
2010	8.22926
2015	7.56036
2020	7.23823
2025	6.30048
2030	6.42057
2035	6.13031
2040	5.41666
2045	4.70402
2050	4.35645
2055	4.38663
2060	4.55639
2065	4.61479
2070	4.4513
2075	4.21739
2080	4.10073
2085	4.18154
2090	4.36333
2095	4.49668
2100	4.48761