Year	Percent
1950	8.68397
1955	8.84759
1960	10.27423
1965	10.19834
1970	9.77733
1975	10.16106
1980	9.36883
1985	10.14702
1990	10.08512
1995	9.53388
2000	7.72074
2005	6.37072
2010	6.03986
2015	6.65993
2020	7.28588
2025	7.00833
2030	6.24299
2035	5.58817
2040	5.34669
2045	5.51172
2050	5.78417
2055	5.87307
2060	5.70988
2065	5.44147
2070	5.26692
2075	5.26278
2080	5.34505
2085	5.39981
2090	5.34646
2095	5.21027
2100	5.08401