Year	Percent
1950	27.25889
1955	29.40008
1960	32.05433
1965	28.11771
1970	24.49695
1975	24.36151
1980	26.21431
1985	31.74446
1990	33.99609
1995	33.96777
2000	33.43608
2005	32.66323
2010	34.18049
2015	34.50377
2020	32.87021
2025	29.48496
2030	25.95515
2035	24.80735
2040	25.13166
2045	25.59395
2050	25.27976
2055	23.76219
2060	22.88962
2065	22.84741
2070	23.10967
2075	23.10112
2080	22.7591
2085	22.34045
2090	22.03749
2095	21.91276
2100	21.87969