Year	Percent
1950	29.88737
1955	29.53142
1960	27.87367
1965	25.85404
1970	25.68967
1975	25.44862
1980	26.03278
1985	27.39892
1990	27.47938
1995	28.0044
2000	29.30368
2005	31.0804
2010	32.80404
2015	32.23482
2020	30.69499
2025	29.18471
2030	27.90802
2035	28.99272
2040	29.82847
2045	29.87836
2050	29.50515
2055	28.19045
2060	27.66393
2065	27.56768
2070	27.4693
2075	27.014
2080	26.23984
2085	25.49636
2090	24.90758
2095	24.44245
2100	24.0011