Year	Percent
1950	28.90033
1955	28.52128
1960	27.72964
1965	26.64771
1970	25.68961
1975	25.8951
1980	25.94378
1985	26.10993
1990	26.72002
1995	26.97345
2000	27.82391
2005	29.12301
2010	30.52688
2015	32.00446
2020	32.90978
2025	33.28576
2030	32.85729
2035	31.87667
2040	30.79961
2045	29.67939
2050	28.92751
2055	28.12045
2060	27.17622
2065	26.19946
2070	25.28321
2075	24.47773
2080	23.78009
2085	23.16277
2090	22.60972
2095	22.1094
2100	21.66009