Year	Percent
1950	27.80078
1955	27.10271
1960	26.9969
1965	25.47119
1970	24.80459
1975	26.56741
1980	27.15652
1985	28.73649
1990	29.63327
1995	32.35524
2000	33.4232
2005	31.22012
2010	32.32576
2015	34.16647
2020	35.01912
2025	33.31973
2030	29.01527
2035	24.99696
2040	22.36369
2045	21.69867
2050	22.53291
2055	22.59549
2060	21.99516
2065	20.56908
2070	19.32832
2075	19.01253
2080	19.52488
2085	20.18036
2090	20.37591
2095	20.01146
2100	19.4466