Year	Percent
1950	7.88989
1955	7.2672
1960	7.65849
1965	8.93345
1970	9.5865
1975	9.97508
1980	9.5883
1985	7.57995
1990	6.75365
1995	6.5089
2000	6.57019
2005	6.49884
2010	6.31737
2015	5.67162
2020	5.11493
2025	5.45008
2030	5.40805
2035	5.34811
2040	5.25814
2045	5.15417
2050	5.05258
2055	5.05143
2060	5.11371
2065	5.15343
2070	5.14047
2075	5.09006
2080	5.03705
2085	5.00502
2090	4.99962
2095	4.99401
2100	4.97199