Year	Percent
1950	9.61319
1955	9.50472
1960	9.43166
1965	9.32248
1970	10.51689
1975	10.44907
1980	10.39659
1985	10.32351
1990	10.56689
1995	10.53978
2000	10.6221
2005	10.33152
2010	9.67029
2015	9.06485
2020	8.59551
2025	8.43541
2030	8.47186
2035	8.13865
2040	7.7399
2045	7.35968
2050	7.06374
2055	6.84984
2060	6.65629
2065	6.43821
2070	6.21549
2075	6.00961
2080	5.85337
2085	5.73481
2090	5.63107
2095	5.53901
2100	5.44527