Year	Percent
1950	6.94764
1955	7.86777
1960	8.50168
1965	7.96583
1970	7.73989
1975	8.25615
1980	8.17411
1985	6.83566
1990	5.85196
1995	6.04073
2000	6.17654
2005	6.20096
2010	5.54716
2015	4.9553
2020	4.88999
2025	5.05119
2030	5.19536
2035	5.0911
2040	4.91259
2045	4.74785
2050	4.69356
2055	4.76699
2060	4.90009
2065	4.97664
2070	4.96082
2075	4.88429
2080	4.81981
2085	4.79842
2090	4.80826
2095	4.8196
2100	4.79993