Year	Percent
1950	16.85147
1955	17.17637
1960	17.54608
1965	18.077
1970	18.53959
1975	18.9289
1980	19.01557
1985	18.66416
1990	18.05796
1995	17.05894
2000	16.45249
2005	16.73813
2010	16.56074
2015	15.67174
2020	14.73279
2025	14.00851
2030	13.48038
2035	12.96145
2040	12.39984
2045	11.81696
2050	11.24552
2055	10.75175
2060	10.28942
2065	9.87784
2070	9.46173
2075	9.05188
2080	8.67218
2085	8.32217
2090	7.97658
2095	7.6736
2100	7.3915