Year	Percent
1950	11.55741
1955	11.11962
1960	10.45959
1965	12.22475
1970	11.8522
1975	11.54454
1980	11.58022
1985	11.746
1990	12.11196
1995	12.13443
2000	12.16709
2005	12.50714
2010	12.65688
2015	11.7734
2020	10.36313
2025	8.72303
2030	8.32919
2035	7.92426
2040	7.35337
2045	6.65666
2050	6.07601
2055	5.71381
2060	5.45778
2065	5.23724
2070	5.02189
2075	4.83328
2080	4.6977
2085	4.61903
2090	4.59071
2095	4.57883
2100	4.56405