Year	Percent
1950	9.3293
1955	9.29203
1960	5.8635
1965	6.31775
1970	7.7722
1975	8.71351
1980	8.0238
1985	6.75521
1990	6.66568
1995	6.79543
2000	7.39908
2005	7.29415
2010	5.78293
2015	4.41907
2020	4.28838
2025	4.99627
2030	5.699
2035	5.59054
2040	5.26375
2045	4.83627
2050	4.68867
2055	4.96072
2060	5.3664
2065	5.55935
2070	5.45381
2075	5.23007
2080	5.1102
2085	5.17382
2090	5.33739
2095	5.42557
2100	5.36704