Year	Percent
1950	25.79415
1955	28.45088
1960	31.55732
1965	32.05281
1970	30.38243
1975	29.68489
1980	30.60814
1985	31.66869
1990	32.28779
1995	32.50241
2000	30.94903
2005	29.70243
2010	29.44146
2015	28.58698
2020	28.3685
2025	26.99507
2030	25.10629
2035	23.43608
2040	23.39428
2045	24.62598
2050	25.28106
2055	24.72278
2060	23.8624
2065	23.1244
2070	23.02077
2075	23.50747
2080	23.96379
2085	23.88127
2090	23.33627
2095	22.75392
2100	22.49774