Year	Percent
1950	22.03346
1955	24.38471
1960	26.5493
1965	27.33043
1970	28.07955
1975	26.83143
1980	23.30877
1985	25.03563
1990	27.36234
1995	32.86326
2000	33.02554
2005	33.84758
2010	32.95075
2015	31.80459
2020	31.4177
2025	30.81656
2030	30.79363
2035	31.22937
2040	31.24406
2045	30.98889
2050	30.32861
2055	29.3914
2060	28.72118
2065	28.19991
2070	27.64362
2075	26.91465
2080	26.0456
2085	25.17055
2090	24.4315
2095	23.87088
2100	23.41154