Year	Percent
1950	12.57756
1955	14.71041
1960	15.62853
1965	15.14185
1970	15.37111
1975	13.63745
1980	12.83511
1985	12.43953
1990	12.31663
1995	11.85164
2000	11.08267
2005	10.48532
2010	9.35861
2015	8.15515
2020	7.79975
2025	7.71382
2030	7.43675
2035	6.8875
2040	6.24736
2045	5.75509
2050	5.50847
2055	5.44787
2060	5.4064
2065	5.27816
2070	5.08296
2075	4.90411
2080	4.81092
2085	4.81351
2090	4.85111
2095	4.84956
2100	4.79014