Year	Percent
1950	10.4178
1955	10.41673
1960	10.40484
1965	10.52067
1970	10.16851
1975	10.34097
1980	10.40527
1985	10.52111
1990	10.69475
1995	10.86549
2000	10.94676
2005	10.7207
2010	10.60936
2015	10.49003
2020	10.80668
2025	10.94267
2030	10.95034
2035	10.64075
2040	10.40466
2045	10.24531
2050	10.09069
2055	9.88121
2060	9.62541
2065	9.34123
2070	9.07707
2075	8.83937
2080	8.59373
2085	8.35862
2090	8.11448
2095	7.87536
2100	7.65205