Year	Percent
1950	10.14392
1955	10.37746
1960	11.05479
1965	11.82571
1970	12.43227
1975	13.12439
1980	13.56548
1985	13.87876
1990	14.93062
1995	16.28266
2000	17.98946
2005	21.80994
2010	21.74704
2015	22.0106
2020	22.20776
2025	22.69528
2030	23.08855
2035	23.78097
2040	23.51766
2045	23.06659
2050	23.82499
2055	24.47022
2060	25.16342
2065	25.44713
2070	24.97753
2075	24.53064
2080	24.34568
2085	24.27976
2090	24.14625
2095	23.87426
2100	23.54534