Year	Percent
1950	29.16459
1955	30.94724
1960	32.73256
1965	31.23822
1970	32.00977
1975	29.33247
1980	28.03837
1985	26.48898
1990	28.74428
1995	27.16396
2000	27.03352
2005	27.26437
2010	27.14852
2015	27.60442
2020	28.15047
2025	29.01708
2030	30.15873
2035	31.31519
2040	32.13752
2045	32.65606
2050	32.94257
2055	33.0003
2060	32.90939
2065	32.63858
2070	32.18143
2075	31.58749
2080	30.94762
2085	30.34214
2090	29.80914
2095	29.33376
2100	28.8722