data = [{"date":"1896","value":12.2},
{"date":"1896","value":12.2},
{"date":"1896","value":11.8},
{"date":"1900","value":11.4},
{"date":"1900","value":11.4},
{"date":"1900","value":10.8},
{"date":"1900","value":10.8},
{"date":"1908","value":10.8},
{"date":"1908","value":10.8},
{"date":"1908","value":10.8},
{"date":"1908","value":10.8},
{"date":"1912","value":10.8},
{"date":"1912","value":10.6},
{"date":"1924","value":10.6},
{"date":"1924","value":10.6},
{"date":"1924","value":10.6},
{"date":"1928","value":10.6},
{"date":"1928","value":10.6},
{"date":"1928","value":10.6},
{"date":"1932","value":10.6},
{"date":"1932","value":10.4},
{"date":"1932","value":10.3},
{"date":"1936","value":10.3},
{"date":"1948","value":10.3},
{"date":"1956","value":10.3},
{"date":"1956","value":10.3},
{"date":"1956","value":10.3},
{"date":"1960","value":10.2},
{"date":"1960","value":10.2},
{"date":"1964","value":10},
{"date":"1968","value":10},
{"date":"1968","value":10},
{"date":"1968","value":10},
{"date":"1968","value":9.9},
{"date":"1988","value":9.92},
{"date":"1996","value":9.84},
{"date":"2008","value":9.69},
{"date":"2012","value":9.63}]