Year	Percent
1950	15.89661
1955	16.36993
1960	16.78988
1965	17.3132
1970	17.67438
1975	17.92893
1980	17.93868
1985	17.20162
1990	16.49548
1995	16.11661
2000	16.34692
2005	16.55223
2010	16.6303
2015	16.29318
2020	15.10061
2025	14.45941
2030	14.14123
2035	13.82427
2040	13.29092
2045	12.60868
2050	11.98029
2055	11.47073
2060	11.02349
2065	10.59397
2070	10.12092
2075	9.6418
2080	9.20118
2085	8.7984
2090	8.44562
2095	8.08977
2100	7.75651