Year	Percent
1950	8.5966
1955	8.43181
1960	8.59194
1965	8.18233
1970	11.16066
1975	11.59699
1980	11.93066
1985	11.0654
1990	10.796
1995	10.27117
2000	10.17293
2005	8.73007
2010	8.41766
2015	6.37849
2020	6.05421
2025	7.04762
2030	8.1666
2035	7.62159
2040	6.75029
2045	6.33304
2050	6.36007
2055	6.56972
2060	6.63966
2065	6.43753
2070	6.07619
2075	5.80153
2080	5.70731
2085	5.71748
2090	5.70448
2095	5.59243
2100	5.43364