Year	Percent
1950	12.4238
1955	12.89928
1960	13.24105
1965	13.76374
1970	14.33
1975	14.82486
1980	15.36963
1985	15.95553
1990	17.25054
1995	18.85182
2000	22.02365
2005	23.64006
2010	24.16533
2015	24.64731
2020	25.54349
2025	26.13093
2030	26.08142
2035	25.78557
2040	24.65569
2045	24.28265
2050	24.81767
2055	25.08688
2060	25.13101
2065	24.30797
2070	23.11426
2075	22.56573
2080	22.48769
2085	22.58838
2090	22.51057
2095	22.08253
2100	21.4881