Year	Percent
1950	16.01335
1955	16.29088
1960	16.46517
1965	16.43808
1970	16.20568
1975	15.71368
1980	15.13564
1985	14.56367
1990	14.00697
1995	13.36737
2000	12.73946
2005	12.30211
2010	12.28709
2015	12.84959
2020	13.71822
2025	14.75185
2030	15.72153
2035	16.66686
2040	17.82653
2045	19.1992
2050	20.79526
2055	22.19472
2060	23.33614
2065	24.20121
2070	24.82223
2075	25.40359
2080	25.88767
2085	26.25369
2090	26.50744
2095	26.68604
2100	26.78262