Year	Percent
1950	26.45827
1955	29.72638
1960	32.28838
1965	28.85871
1970	24.76845
1975	24.92163
1980	27.36446
1985	32.68582
1990	33.76528
1995	33.73419
2000	32.06047
2005	32.14472
2010	34.10396
2015	34.7774
2020	33.80609
2025	31.16249
2030	28.6892
2035	28.3921
2040	28.82985
2045	29.1215
2050	28.44746
2055	26.35528
2060	25.15194
2065	24.85422
2070	24.88549
2075	24.65118
2080	24.09492
2085	23.52586
2090	23.17786
2095	23.0521
2100	23.03083