Year	Percent
1950	9.23619
1955	9.31419
1960	9.52758
1965	9.674
1970	9.47598
1975	10.74406
1980	12.08009
1985	11.60372
1990	10.74191
1995	9.40505
2000	10.27271
2005	10.53028
2010	9.57333
2015	8.82682
2020	7.21909
2025	5.9121
2030	5.69487
2035	5.50981
2040	5.27227
2045	5.02638
2050	4.75018
2055	4.49868
2060	4.37229
2065	4.364
2070	4.403
2075	4.4175
2080	4.40347
2085	4.39224
2090	4.40949
2095	4.47024
2100	4.53906