Year	Percent
1950	7.18537
1955	7.78806
1960	9.41282
1965	9.32885
1970	10.0649
1975	9.90031
1980	10.49877
1985	11.11079
1990	10.80603
1995	11.34163
2000	11.36379
2005	11.28234
2010	9.67164
2015	10.08957
2020	10.54084
2025	11.03612
2030	10.00884
2035	9.20136
2040	8.77045
2045	8.55637
2050	8.37554
2055	8.09461
2060	7.71683
2065	7.29165
2070	6.90995
2075	6.60329
2080	6.33657
2085	6.09022
2090	5.83549
2095	5.58984
2100	5.37491