Year	Percent
1950	9.52694
1955	9.10853
1960	8.41452
1965	7.51611
1970	7.62254
1975	8.66669
1980	8.51485
1985	7.72508
1990	7.46059
1995	7.00648
2000	7.45392
2005	7.72427
2010	7.24783
2015	5.78384
2020	4.72291
2025	4.90884
2030	5.48108
2035	5.63983
2040	5.78432
2045	5.52286
2050	5.1241
2055	5.03916
2060	5.28486
2065	5.56004
2070	5.66191
2075	5.54861
2080	5.32838
2085	5.20094
2090	5.2549
2095	5.39132
2100	5.46134