Year	Percent
1950	17.67843
1955	17.4984
1960	16.87459
1965	16.47326
1970	16.1503
1975	15.82407
1980	15.40378
1985	14.77639
1990	14.05117
1995	13.56288
2000	13.19097
2005	12.75752
2010	12.51263
2015	12.22001
2020	12.2431
2025	12.63116
2030	13.26609
2035	14.27322
2040	15.93549
2045	17.9175
2050	19.75535
2055	21.1342
2060	21.73797
2065	22.21318
2070	22.86778
2075	23.61816
2080	24.36045
2085	24.7261
2090	24.7933
2095	24.75856
2100	24.77648