Year	Percent
1950	12.23176
1955	12.76584
1960	13.36868
1965	10.85576
1970	11.27202
1975	12.09538
1980	12.62874
1985	12.47424
1990	12.80799
1995	12.02333
2000	13.17394
2005	12.03936
2010	11.37048
2015	10.55855
2020	9.52498
2025	9.09309
2030	8.66825
2035	8.27829
2040	7.84968
2045	7.38039
2050	6.94235
2055	6.59785
2060	6.35498
2065	6.18033
2070	6.03574
2075	5.88922
2080	5.75799
2085	5.63401
2090	5.55348
2095	5.49565
2100	5.45319