Year	Percent
1950	12.66679
1955	13.37481
1960	15.0887
1965	16.97671
1970	18.72556
1975	19.41478
1980	16.81263
1985	17.54512
1990	20.88731
1995	21.02333
2000	21.1407
2005	22.72827
2010	25.32581
2015	27.77874
2020	29.12292
2025	30.2084
2030	31.36024
2035	33.80425
2040	36.5594
2045	37.67228
2050	38.51185
2055	38.79364
2060	37.65702
2065	36.72358
2070	36.65134
2075	36.52807
2080	36.53451
2085	36.59094
2090	36.5688
2095	36.59673
2100	36.91522