Year	Percent
1950	15.78359
1955	16.59796
1960	17.08031
1965	16.758
1970	15.99092
1975	14.97295
1980	14.00739
1985	13.55654
1990	12.84288
1995	12.43646
2000	11.92989
2005	11.34733
2010	11.25583
2015	11.45791
2020	11.93294
2025	12.39343
2030	12.65842
2035	12.93878
2040	13.44589
2045	14.45057
2050	15.92629
2055	17.39584
2060	18.74813
2065	19.91383
2070	20.92272
2075	21.92531
2080	22.86899
2085	23.63719
2090	24.18522
2095	24.56214
2100	24.82212