Year	Percent
1950	26.79107
1955	26.04718
1960	25.63885
1965	25.76849
1970	25.2512
1975	25.42485
1980	25.5219
1985	25.61314
1990	26.1874
1995	26.88135
2000	27.20324
2005	27.73592
2010	27.85512
2015	28.31164
2020	28.95458
2025	29.55375
2030	30.14841
2035	30.60542
2040	30.88443
2045	31.08013
2050	31.15006
2055	31.12128
2060	31.06652
2065	30.94219
2070	30.76241
2075	30.55569
2080	30.33047
2085	30.1181
2090	29.90307
2095	29.68329
2100	29.44922