Year	Percent
1950	8.59427
1955	10.20632
1960	10.02706
1965	9.98584
1970	9.79005
1975	9.02213
1980	8.85209
1985	7.48862
1990	7.40881
1995	7.17516
2000	7.12965
2005	6.56921
2010	6.12357
2015	6.39134
2020	6.40059
2025	6.43608
2030	6.146
2035	5.87005
2040	5.68115
2045	5.65248
2050	5.69894
2055	5.71414
2060	5.64118
2065	5.52083
2070	5.40552
2075	5.33084
2080	5.30235
2085	5.27698
2090	5.22925
2095	5.15
2100	5.06022