Year	Percent
1950	7.81021
1955	7.2262
1960	7.74549
1965	9.11033
1970	9.82342
1975	10.33582
1980	10.07331
1985	8.10804
1990	7.24449
1995	7.02525
2000	7.08176
2005	7.0003
2010	6.73168
2015	6.10726
2020	5.46256
2025	5.75209
2030	5.7169
2035	5.67589
2040	5.58177
2045	5.47067
2050	5.35892
2055	5.35159
2060	5.40958
2065	5.44469
2070	5.42574
2075	5.36774
2080	5.30732
2085	5.26804
2090	5.25702
2095	5.24603
2100	5.22041