Year	Percent
1950	13.97551
1955	14.52903
1960	15.97446
1965	16.46592
1970	16.13276
1975	15.28565
1980	14.39102
1985	13.55002
1990	13.16354
1995	12.54491
2000	12.07308
2005	11.15657
2010	10.78806
2015	10.28766
2020	9.74264
2025	9.11329
2030	8.53525
2035	8.02192
2040	7.5581
2045	7.13315
2050	6.74359
2055	6.39601
2060	6.09045
2065	5.83044
2070	5.61183
2075	5.42963
2080	5.26796
2085	5.13495
2090	5.02422
2095	4.93774
2100	4.87285