Year	Percent
1950	7.92172
1955	7.40019
1960	7.76954
1965	9.36146
1970	8.3059
1975	8.33959
1980	8.6135
1985	8.2119
1990	6.96053
1995	5.77235
2000	5.69096
2005	5.84662
2010	5.92022
2015	5.78103
2020	5.73541
2025	5.26295
2030	4.98832
2035	5.05714
2040	5.15781
2045	5.18141
2050	5.13486
2055	5.03623
2060	4.95212
2065	4.95309
2070	5.0166
2075	5.04826
2080	5.02539
2085	4.95883
2090	4.89307
2095	4.86331
2100	4.87107