Year	Percent
1950	8.9685
1955	8.74033
1960	7.82227
1965	8.44855
1970	7.63186
1975	7.75229
1980	8.51136
1985	8.45427
1990	7.9368
1995	6.57829
2000	5.66525
2005	5.23907
2010	5.10036
2015	4.94357
2020	5.01823
2025	5.08748
2030	4.70498
2035	4.52163
2040	4.45481
2045	4.52372
2050	4.66668
2055	4.80068
2060	4.86108
2065	4.8472
2070	4.82317
2075	4.837
2080	4.88333
2085	4.92647
2090	4.94154
2095	4.919
2100	4.87197