Year	Percent
1950	10.25694
1955	6.73995
1960	6.52691
1965	9.32581
1970	15.48813
1975	14.98031
1980	11.47065
1985	9.05949
1990	7.65098
1995	6.25761
2000	7.48538
2005	9.99779
2010	7.45442
2015	4.8834
2020	3.14142
2025	3.47065
2030	4.54259
2035	5.21403
2040	5.08146
2045	4.67213
2050	4.25525
2055	4.13724
2060	4.34589
2065	4.6791
2070	4.9018
2075	4.92669
2080	4.83169
2085	4.75575
2090	4.7684
2095	4.83586
2100	4.8879