Year	Percent
1950	15.09116
1955	15.9846
1960	16.77891
1965	17.28795
1970	17.73932
1975	18.28808
1980	18.56847
1985	18.6397
1990	17.91367
1995	17.08673
2000	17.42045
2005	17.53724
2010	16.80771
2015	15.86549
2020	15.17821
2025	14.58083
2030	14.0083
2035	13.38424
2040	12.73969
2045	12.08451
2050	11.47475
2055	10.91909
2060	10.393
2065	9.91248
2070	9.43515
2075	8.97463
2080	8.54394
2085	8.13609
2090	7.76136
2095	7.40171
2100	7.07489