Year	Percent
1950	10.05255
1955	10.35522
1960	10.07649
1965	9.27335
1970	10.21868
1975	10.57971
1980	10.78869
1985	10.27378
1990	9.73023
1995	10.44702
2000	11.68989
2005	11.36982
2010	10.85202
2015	10.46173
2020	9.9427
2025	9.64472
2030	9.18358
2035	8.84035
2040	8.44417
2045	8.05853
2050	7.71153
2055	7.40099
2060	7.14211
2065	6.88822
2070	6.67264
2075	6.47158
2080	6.30891
2085	6.17208
2090	6.05451
2095	5.94732
2100	5.85198