Year	Percent
1950	12.0629
1955	12.1585
1960	10.95265
1965	11.50098
1970	11.77604
1975	11.89954
1980	12.01246
1985	12.26286
1990	12.53419
1995	12.81
2000	12.26935
2005	11.75765
2010	12.23469
2015	12.56655
2020	12.30431
2025	11.81363
2030	11.4763
2035	11.20284
2040	10.92771
2045	10.60448
2050	10.2486
2055	9.86946
2060	9.50432
2065	9.16362
2070	8.83161
2075	8.52647
2080	8.21167
2085	7.90189
2090	7.60669
2095	7.32121
2100	7.05466