Year	Percent
1950	8.23835
1955	8.33148
1960	8.30358
1965	9.67891
1970	8.30903
1975	6.3932
1980	7.04008
1985	7.83211
1990	8.90862
1995	6.73311
2000	6.61684
2005	6.35876
2010	5.56455
2015	5.34317
2020	5.40556
2025	5.10937
2030	5.08886
2035	5.06754
2040	5.03611
2045	4.93036
2050	4.88324
2055	4.90472
2060	4.92125
2065	4.94357
2070	4.96729
2075	4.96649
2080	4.94923
2085	4.93799
2090	4.93835
2095	4.94107
2100	4.93666