Year	Percent
1950	10.18872
1955	9.1656
1960	8.21789
1965	9.44199
1970	10.50707
1975	10.59369
1980	10.63258
1985	10.66147
1990	11.03879
1995	11.48474
2000	11.80367
2005	11.57204
2010	10.54683
2015	10.82321
2020	10.83466
2025	10.77712
2030	10.0955
2035	9.71012
2040	9.39469
2045	9.14145
2050	8.86216
2055	8.52761
2060	8.17741
2065	7.869
2070	7.58184
2075	7.314
2080	7.05615
2085	6.79899
2090	6.53615
2095	6.30094
2100	6.10417