Year	Percent
1950	10.21789
1955	10.40344
1960	10.42723
1965	10.47743
1970	9.25824
1975	9.48433
1980	9.84615
1985	10.35851
1990	10.67351
1995	10.77251
2000	11.54119
2005	12.56768
2010	11.48843
2015	10.1636
2020	9.00135
2025	8.54942
2030	7.87492
2035	7.57914
2040	7.04704
2045	6.45981
2050	5.95666
2055	5.62064
2060	5.43458
2065	5.32228
2070	5.20682
2075	5.07178
2080	4.94921
2085	4.88086
2090	4.87453
2095	4.89697
2100	4.91027