Year	Percent
1950	13.43364
1955	13.48885
1960	13.5602
1965	13.70914
1970	13.91913
1975	14.2558
1980	14.63018
1985	14.94217
1990	15.07719
1995	13.14265
2000	13.38082
2005	14.33944
2010	16.45998
2015	18.59011
2020	21.53655
2025	25.749
2030	28.42247
2035	30.24684
2040	30.14593
2045	28.36076
2050	26.96892
2055	25.95002
2060	25.61639
2065	25.54238
2070	25.19128
2075	24.77618
2080	24.12986
2085	23.58045
2090	23.26903
2095	23.15366
2100	23.07844