Year	Percent
1950	10.11477
1955	9.93579
1960	8.90777
1965	8.4916
1970	8.02249
1975	8.10583
1980	8.13874
1985	7.31558
1990	6.1262
1995	5.00012
2000	4.54896
2005	4.41451
2010	5.12129
2015	5.25239
2020	4.99041
2025	4.6121
2030	4.29956
2035	4.24412
2040	4.45804
2045	4.72674
2050	4.82668
2055	4.73883
2060	4.60424
2065	4.57223
2070	4.68639
2075	4.86249
2080	4.97878
2085	4.95589
2090	4.8413
2095	4.73323
2100	4.7032