Year	Percent
1950	12.99512
1955	13.49042
1960	12.41141
1965	15.51029
1970	14.10517
1975	12.132
1980	8.26804
1985	7.8952
1990	8.62922
1995	7.58738
2000	6.90099
2005	6.06547
2010	5.4995
2015	5.63709
2020	5.37691
2025	5.16516
2030	4.893
2035	4.66342
2040	4.54949
2045	4.55255
2050	4.58293
2055	4.57524
2060	4.53435
2065	4.50076
2070	4.49582
2075	4.52305
2080	4.5573
2085	4.57051
2090	4.55916
2095	4.52551
2100	4.49917