Year	Percent
1950	9.17353
1955	10.23853
1960	10.18889
1965	8.9068
1970	8.60387
1975	8.18988
1980	8.27392
1985	8.31852
1990	7.40983
1995	6.53944
2000	5.31909
2005	4.77365
2010	4.56766
2015	5.24108
2020	5.40716
2025	5.15825
2030	4.78834
2035	4.4796
2040	4.4328
2045	4.6662
2050	4.95995
2055	5.07856
2060	4.99767
2065	4.86177
2070	4.82529
2075	4.93178
2080	5.09262
2085	5.1862
2090	5.14116
2095	5.01512
2100	4.90715