Year	Percent
1950	16.29452
1955	16.38667
1960	16.24948
1965	16.17302
1970	16.19798
1975	16.35895
1980	15.89219
1985	14.86822
1990	15.02416
1995	15.08036
2000	15.92382
2005	16.99434
2010	17.53008
2015	18.23167
2020	19.28715
2025	20.79291
2030	22.37891
2035	22.83518
2040	22.3191
2045	21.68009
2050	21.18669
2055	22.58591
2060	23.8961
2065	24.56817
2070	24.82326
2075	24.227
2080	24.23714
2085	24.58529
2090	24.90186
2095	24.87299
2100	24.54262