Year	Percent
1950	8.34366
1955	8.19496
1960	8.50783
1965	8.66147
1970	7.80622
1975	7.0059
1980	6.38879
1985	6.24971
1990	6.19018
1995	6.25699
2000	5.83775
2005	5.76889
2010	6.02631
2015	5.94508
2020	5.93573
2025	5.69071
2030	5.48758
2035	5.36324
2040	5.37856
2045	5.44222
2050	5.47152
2055	5.45065
2060	5.38744
2065	5.33196
2070	5.31192
2075	5.32293
2080	5.32451
2085	5.30041
2090	5.24135
2095	5.17416
2100	5.12188