Two-Way Frequency Table

A local park hosts an indoor concert every year on July $1$ and an outdoor concert on August $1$. They've recorded the attendance over the past $4$ years for each venue.

$$\begin{array}{|c|c|c|c|} \hline &\text{Inside}&\text{Outside}&\text{Total}\\ \hline 2013&67&88&155\\ \hline 2014&45&97&144\\ \hline 2015&23&105&128\\ \hline 2016&43&110&153\\ \hline \text{Total}&178&400&578\\ \hline \end{array}$$