Year	Percent
1950	10.40778
1955	10.23
1960	9.647
1965	8.83102
1970	9.25282
1975	9.45939
1980	9.55232
1985	9.74139
1990	10.2398
1995	10.8452
2000	10.78575
2005	10.61022
2010	10.82819
2015	11.11016
2020	10.83777
2025	10.58176
2030	10.59308
2035	10.54523
2040	10.39154
2045	10.16628
2050	9.96871
2055	9.78129
2060	9.59048
2065	9.38754
2070	9.17182
2075	8.97817
2080	8.77822
2085	8.57856
2090	8.36604
2095	8.16922
2100	7.96484