Year	Percent
1950	14.20648
1955	13.55028
1960	13.39977
1965	12.77086
1970	12.37642
1975	11.77988
1980	10.90074
1985	10.61706
1990	10.19488
1995	10.44752
2000	10.33121
2005	10.02592
2010	10.02875
2015	10.7373
2020	12.4533
2025	14.73902
2030	16.88728
2035	18.48334
2040	19.33105
2045	19.84679
2050	20.85064
2055	22.37762
2060	23.63603
2065	24.50643
2070	24.84335
2075	24.81192
2080	25.0054
2085	25.32075
2090	25.56244
2095	25.57216
2100	25.39904