Year	Percent
1950	9.90885
1955	11.19801
1960	10.6878
1965	9.81795
1970	11.91008
1975	12.4009
1980	13.70498
1985	14.0921
1990	13.2204
1995	11.87048
2000	10.58923
2005	10.15463
2010	10.61728
2015	10.84786
2020	10.68461
2025	11.58359
2030	10.56643
2035	9.53123
2040	9.09053
2045	9.02184
2050	9.18129
2055	9.10558
2060	8.63539
2065	7.96546
2070	7.42752
2075	7.20173
2080	7.13731
2085	7.02794
2090	6.74184
2095	6.3544
2100	6.00032