find the interest rate

\begin{tabular}{rrrr} \multicolumn{1}{r|}{ Lower Balance } & Upper Balance & Interest Rate \\ \hline$0.00 & $999.99 & 2% \\ \hline$1,000.00 & $4,999.99 & 3% \\ \hline$5,000.00 & $19,999.99 & 4% \\ $20,000.00 & $99,000.00 & 5% \end{tabular}