Year	Percent
1950	9.5395
1955	8.76014
1960	7.1929
1965	6.67914
1970	6.58827
1975	7.94312
1980	8.18694
1985	6.34658
1990	5.922
1995	5.42442
2000	4.11639
2005	4.32576
2010	5.16047
2015	4.97879
2020	4.83043
2025	4.56687
2030	4.26881
2035	4.17685
2040	4.4281
2045	4.70924
2050	4.77959
2055	4.70043
2060	4.58417
2065	4.53774
2070	4.63363
2075	4.82027
2080	4.94909
2085	4.94464
2090	4.84608
2095	4.7381
2100	4.6944