Year	Percent
1950	10.96267
1955	10.76924
1960	9.42219
1965	9.67346
1970	9.99694
1975	10.71045
1980	11.12725
1985	11.47621
1990	10.6182
1995	9.82318
2000	8.40932
2005	7.60616
2010	7.01664
2015	6.70937
2020	5.99307
2025	5.56791
2030	5.19059
2035	4.62772
2040	4.38636
2045	4.39559
2050	4.41646
2055	4.38545
2060	4.35132
2065	4.31326
2070	4.29827
2075	4.34011
2080	4.42331
2085	4.48634
2090	4.5184
2095	4.52539
2100	4.53689