Table: The Consumer Price Index $($CPI$)$

$\backslash$table$[[$February$,2009,212\mathrm{.}2],[$February$,2010,216\mathrm{.}7],[$February$,2011,221\mathrm{.}6],[$February$,2012,]]$

$($Ref $19-2$ Table: The Consumer Price Index $($CPI$))$ Use Table: The Consumer Price Index $($CPI$).$ The consumer price index in $2009$ was $212\mathrm{.}2.$ In $2010,$ it was $216\mathrm{.}7.$ What was the rate of inflation from $2009$ to $2010?$

$16\mathrm{.}7\%$

$12\mathrm{.}2\%$

$4\mathrm{.}5\%$

$2\mathrm{.}1\%$