Year	Percent
1950	8.58166
1955	9.59007
1960	8.94603
1965	8.20576
1970	7.647
1975	7.50786
1980	7.68624
1985	7.77712
1990	6.93572
1995	6.52275
2000	5.43949
2005	4.25767
2010	4.53155
2015	5.21501
2020	5.0934
2025	5.0697
2030	4.94954
2035	4.73764
2040	4.64597
2045	4.83416
2050	5.06559
2055	5.137
2060	5.0868
2065	4.99513
2070	4.94492
2075	4.98854
2080	5.08158
2085	5.12593
2090	5.07474
2095	4.97412
2100	4.89419