Year	Percent
1950	9.38691
1955	9.04468
1960	9.3612
1965	9.60048
1970	10.18818
1975	10.07457
1980	10.12595
1985	10.50634
1990	11.03
1995	10.82752
2000	10.42598
2005	10.91235
2010	11.45704
2015	10.73081
2020	9.81141
2025	9.47432
2030	9.95057
2035	9.65093
2040	9.22753
2045	8.75545
2050	8.35497
2055	8.05655
2060	7.81819
2065	7.5528
2070	7.23794
2075	6.91861
2080	6.64048
2085	6.41272
2090	6.22459
2095	6.05786
2100	5.88464