Year	Percent
1950	13.86853
1955	12.37961
1960	11.81179
1965	11.63382
1970	11.3018
1975	11.41831
1980	11.44774
1985	11.2329
1990	11.5458
1995	12.78005
2000	13.61335
2005	14.19952
2010	15.20061
2015	16.31932
2020	18.58015
2025	21.61747
2030	24.0335
2035	25.55633
2040	25.86199
2045	25.20855
2050	24.95312
2055	25.42962
2060	26.04688
2065	26.62328
2070	26.77557
2075	26.34008
2080	25.92618
2085	25.66625
2090	25.53386
2095	25.40232
2100	25.18227