Year	Percent
1950	13.47172
1955	14.56323
1960	15.62246
1965	17.5172
1970	16.83763
1975	15.97179
1980	17.06461
1985	18.43265
1990	19.87065
1995	21.43328
2000	22.76328
2005	23.11996
2010	23.59803
2015	24.44448
2020	25.3635
2025	26.11291
2030	26.88376
2035	27.8273
2040	28.4399
2045	28.67191
2050	28.31847
2055	26.94151
2060	25.29932
2065	23.94136
2070	23.0101
2075	22.82586
2080	22.69505
2085	22.52624
2090	22.27148
2095	22.07893
2100	22.03471