Year	Percent
1950	10.09582
1955	9.91396
1960	9.82965
1965	10.46726
1970	10.00861
1975	11.30751
1980	11.7451
1985	10.55603
1990	8.94366
1995	9.20542
2000	9.59448
2005	9.49671
2010	8.88441
2015	8.089
2020	7.03321
2025	6.73887
2030	6.33121
2035	6.00153
2040	5.64206
2045	5.34844
2050	5.11742
2055	4.94529
2060	4.84512
2065	4.76421
2070	4.69199
2075	4.62088
2080	4.58336
2085	4.5687
2090	4.57298
2095	4.58365
2100	4.58345