Year	Percent
1950	10.96893
1955	11.87337
1960	11.58881
1965	12.48975
1970	12.29068
1975	12.16591
1980	12.09645
1985	12.1543
1990	12.39281
1995	12.25808
2000	11.82234
2005	11.50582
2010	11.25513
2015	10.73117
2020	10.10037
2025	9.48355
2030	9.1991
2035	8.86585
2040	8.49641
2045	8.09917
2050	7.72053
2055	7.37196
2060	7.06524
2065	6.78529
2070	6.53138
2075	6.29262
2080	6.07699
2085	5.8817
2090	5.71619
2095	5.57132
2100	5.44314