Year	Percent
1950	28.90297
1955	28.46266
1960	27.93323
1965	27.49547
1970	27.04911
1975	26.9303
1980	27.34035
1985	26.38037
1990	23.04022
1995	25.87678
2000	25.87785
2005	26.41754
2010	26.89924
2015	27.42409
2020	28.21798
2025	29.165
2030	30.09442
2035	30.74287
2040	31.05836
2045	31.21592
2050	31.34825
2055	31.46118
2060	31.53041
2065	31.44069
2070	31.18293
2075	30.81634
2080	30.40434
2085	29.96753
2090	29.52231
2095	29.05431
2100	28.57948