Year	Percent
1950	32.97569
1955	31.59048
1960	28.80883
1965	26.45384
1970	24.97361
1975	25.80643
1980	27.476
1985	29.14177
1990	31.05866
1995	32.08131
2000	33.02117
2005	33.55339
2010	32.71121
2015	32.16361
2020	32.21053
2025	32.64163
2030	32.48563
2035	31.5775
2040	30.38371
2045	28.93692
2050	28.21419
2055	28.00889
2060	27.72223
2065	27.22178
2070	26.6172
2075	26.12632
2080	25.85499
2085	25.77883
2090	25.74497
2095	25.62555
2100	25.40391