Year	Percent
1950	9.4152
1955	13.3131
1960	14.42045
1965	12.83427
1970	10.27867
1975	10.38966
1980	10.12938
1985	10.65866
1990	10.47981
1995	8.08485
2000	6.12009
2005	5.34566
2010	5.75186
2015	5.87159
2020	5.28074
2025	4.76059
2030	4.42548
2035	4.24026
2040	4.29101
2045	4.43311
2050	4.4764
2055	4.39011
2060	4.29283
2065	4.2921
2070	4.41267
2075	4.59266
2080	4.72487
2085	4.74105
2090	4.68203
2095	4.63831
2100	4.65666