Year	Percent
1950	16.04728
1955	17.20947
1960	17.55186
1965	17.65522
1970	17.76999
1975	18.06153
1980	18.17168
1985	18.14828
1990	17.40196
1995	16.56033
2000	16.91122
2005	16.99036
2010	16.3002
2015	15.45055
2020	14.81685
2025	14.25855
2030	13.67761
2035	13.05322
2040	12.41509
2045	11.78349
2050	11.18906
2055	10.63815
2060	10.11205
2065	9.63021
2070	9.15196
2075	8.69496
2080	8.26709
2085	7.86404
2090	7.49653
2095	7.14703
2100	6.83307