Year	Percent
1950	10.21849
1955	10.43193
1960	10.50838
1965	10.29689
1970	9.88845
1975	10.02169
1980	10.03875
1985	9.93095
1990	10.42994
1995	10.89276
2000	10.95914
2005	10.58066
2010	10.25863
2015	10.32463
2020	10.67382
2025	10.88836
2030	10.98573
2035	10.76032
2040	10.51922
2045	10.34616
2050	10.19756
2055	10.01729
2060	9.78358
2065	9.51411
2070	9.2504
2075	8.97432
2080	8.73815
2085	8.51843
2090	8.28238
2095	8.04128
2100	7.80164