[["", "december 31 2008", "december 31 2009", "december 31 2010", "december 31 2011"], ["disca", "$ 102.53", "$ 222.09", "$ 301.96", "$ 296.67"], ["discb", "$ 78.53", "$ 162.82", "$ 225.95", "$ 217.56"], ["disck", "$ 83.69", "$ 165.75", "$ 229.31", "$ 235.63"], ["s&p 500", "$ 74.86", "$ 92.42", "$ 104.24", "$ 104.23"], ["peer group", "$ 68.79", "$ 100.70", "$ 121.35", "$ 138.19"]]