Year	Percent
1950	12.67598
1955	13.32671
1960	12.60658
1965	10.34981
1970	7.99822
1975	8.32155
1980	8.41478
1985	8.88407
1990	8.51743
1995	5.93958
2000	4.81341
2005	5.32523
2010	6.14162
2015	7.18921
2020	6.81606
2025	6.28163
2030	5.68247
2035	5.53197
2040	5.93879
2045	6.44368
2050	6.60079
2055	6.37053
2060	6.02633
2065	5.84793
2070	5.92735
2075	6.1176
2080	6.19792
2085	6.08494
2090	5.85664
2095	5.67156
2100	5.62398