Year	Percent
1950	9.01735
1955	11.67385
1960	10.01831
1965	8.89781
1970	8.33917
1975	7.43148
1980	6.2667
1985	6.60765
1990	6.55359
1995	6.16741
2000	6.32908
2005	5.64284
2010	5.35639
2015	5.59516
2020	5.45695
2025	5.48265
2030	5.42244
2035	5.29944
2040	5.2137
2045	5.22173
2050	5.27186
2055	5.28947
2060	5.25644
2065	5.19515
2070	5.12447
2075	5.08165
2080	5.06233
2085	5.04631
2090	5.01763
2095	4.9672
2100	4.90823