Year	Percent
1950	11.91443
1955	12.85931
1960	14.04344
1965	15.22796
1970	13.36379
1975	13.19241
1980	10.89992
1985	9.39124
1990	9.52219
1995	10.16598
2000	9.78154
2005	7.36293
2010	7.4091
2015	6.72984
2020	6.86747
2025	6.80976
2030	6.58787
2035	6.37825
2040	6.15464
2045	5.9752
2050	5.87353
2055	5.80639
2060	5.70501
2065	5.56069
2070	5.40895
2075	5.29161
2080	5.21299
2085	5.161
2090	5.11861
2095	5.06804
2100	5.01163