Year	Percent
1950	27.5779
1955	27.35295
1960	26.73656
1965	40.0193
1970	46.45183
1975	55.49044
1980	58.94537
1985	52.90865
1990	47.1582
1995	50.6797
2000	51.0858
2005	58.788
2010	63.09061
2015	55.87304
2020	52.2474
2025	50.34441
2030	48.01614
2035	45.5667
2040	41.68777
2045	38.08861
2050	35.24586
2055	33.14099
2060	32.21539
2065	31.47717
2070	30.57789
2075	29.6075
2080	28.69794
2085	27.97282
2090	27.41477
2095	26.90974
2100	26.3547