Year	Percent
1950	11.12184
1955	11.07749
1960	11.0431
1965	11.22236
1970	11.50094
1975	11.79535
1980	12.09086
1985	12.43007
1990	12.62601
1995	12.25461
2000	11.72545
2005	11.37693
2010	11.34519
2015	11.81216
2020	12.39634
2025	12.27529
2030	11.45943
2035	11.03295
2040	10.8872
2045	10.78935
2050	10.53138
2055	10.12403
2060	9.72536
2065	9.40652
2070	9.13505
2075	8.87831
2080	8.58014
2085	8.2686
2090	7.97825
2095	7.7124
2100	7.4829