Year	Percent
1950	29.28356
1955	28.78169
1960	27.79554
1965	26.51407
1970	25.43548
1975	25.46608
1980	25.1178
1985	24.90688
1990	25.24455
1995	25.29112
2000	26.07783
2005	27.71659
2010	29.71884
2015	31.92336
2020	33.47261
2025	34.31358
2030	34.14841
2035	33.29858
2040	32.27482
2045	31.15592
2050	30.39141
2055	29.56109
2060	28.57631
2065	27.54698
2070	26.5729
2075	25.71089
2080	24.96749
2085	24.3133
2090	23.72972
2095	23.19877
2100	22.72177