Year	Percent
1950	11.64328
1955	9.7245
1960	9.07128
1965	10.5539
1970	11.34507
1975	11.44632
1980	10.51096
1985	9.99126
1990	10.37081
1995	12.29815
2000	12.17036
2005	12.95478
2010	10.09875
2015	10.53674
2020	10.71824
2025	11.05328
2030	10.70284
2035	10.09305
2040	9.50142
2045	9.14983
2050	8.98461
2055	8.76046
2060	8.35966
2065	7.86659
2070	7.42265
2075	7.09049
2080	6.82247
2085	6.58054
2090	6.31195
2095	6.05712
2100	5.84384