Year	Percent
1950	11.88365
1955	13.01445
1960	12.12952
1965	8.98134
1970	7.84631
1975	8.25988
1980	8.99688
1985	9.16746
1990	7.76192
1995	6.66624
2000	5.33513
2005	4.65961
2010	5.23786
2015	4.97221
2020	4.52352
2025	4.12604
2030	3.88058
2035	3.76525
2040	3.85224
2045	3.97988
2050	3.98216
2055	3.87714
2060	3.79376
2065	3.7975
2070	3.91138
2075	4.07932
2080	4.20568
2085	4.2484
2090	4.23072
2095	4.22673
2100	4.26998