Year	Percent
1950	14.32562
1955	13.90473
1960	13.02764
1965	12.73174
1970	12.63625
1975	12.34235
1980	12.29123
1985	12.50198
1990	12.8949
1995	13.96223
2000	15.36276
2005	16.87664
2010	18.74285
2015	21.0388
2020	22.82676
2025	24.16442
2030	25.19407
2035	25.52906
2040	26.06432
2045	26.45537
2050	26.42302
2055	26.25928
2060	25.86202
2065	25.46155
2070	25.05935
2075	24.43444
2080	23.81114
2085	23.29914
2090	22.9337
2095	22.67647
2100	22.4593