Year	Percent
1950	9.91516
1955	11.46744
1960	9.98887
1965	10.14661
1970	9.31197
1975	10.02741
1980	8.72742
1985	10.59693
1990	9.92233
1995	10.87354
2000	11.1963
2005	10.57493
2010	10.4741
2015	10.70202
2020	10.87859
2025	10.93099
2030	10.95386
2035	10.74801
2040	10.4925
2045	10.22902
2050	9.95837
2055	9.64078
2060	9.2598
2065	8.85424
2070	8.46734
2075	8.12483
2080	7.81896
2085	7.54846
2090	7.28448
2095	7.03219
2100	6.8024