Year	Percent
1950	29.70268
1955	30.11048
1960	28.70894
1965	24.82454
1970	24.18495
1975	25.82205
1980	27.69527
1985	29.96967
1990	32.08429
1995	30.86832
2000	29.6875
2005	30.14775
2010	30.54474
2015	30.80284
2020	31.06282
2025	29.19269
2030	29.05205
2035	29.50652
2040	29.69215
2045	30.78508
2050	30.05964
2055	29.10439
2060	28.37
2065	28.14632
2070	28.27363
2075	28.37524
2080	28.06293
2085	27.33737
2090	26.59736
2095	26.13518
2100	25.96545