Year	Percent
1950	29.46315
1955	28.71683
1960	27.64396
1965	26.93835
1970	26.3519
1975	26.16057
1980	24.74059
1985	24.73069
1990	28.09573
1995	29.86246
2000	31.28739
2005	30.72947
2010	30.90863
2015	32.21436
2020	32.89226
2025	32.83534
2030	32.25095
2035	31.98657
2040	31.90032
2045	31.95822
2050	31.77778
2055	30.93339
2060	30.10188
2065	29.41874
2070	28.8712
2075	28.33641
2080	27.72094
2085	27.01751
2090	26.29555
2095	25.64345
2100	25.09499