Year	Percent
1950	27.36304
1955	27.17395
1960	26.89732
1965	26.48311
1970	26.15442
1975	25.9479
1980	25.92635
1985	26.31306
1990	27.06581
1995	27.8765
2000	28.16059
2005	28.42382
2010	27.74283
2015	28.31196
2020	29.27265
2025	30.42437
2030	31.34214
2035	31.57735
2040	31.41039
2045	31.13447
2050	30.96775
2055	30.90357
2060	30.79562
2065	30.55029
2070	30.17138
2075	29.75369
2080	29.38819
2085	29.09967
2090	28.83078
2095	28.52628
2100	28.1564