find monthly return of each variable

\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|c|c|} \hline & & & & & & & & & & & & \\ \hline & & & & & & 7 & & = & 21 & & & ist \\ \hline Year & Jan & Feb & Mar & Apr & May & Jun & Jul & Aug & Sep & Oct & Nov & Dec \\ \hline 2020 & 8,724 & 9,050 & 7,779 & 5,566 & 7,198 & 8,292 & 8,460 & 8,524 & 8,541 & 8,316 & 8,001 & 7,855 \\ \hline 2021 & 7,723 & 7,824 & 8,553 & 8,839 & 9,081 & 9,362 & 9,297 & 9,182 & 8,932 & 9,027 & 9,021 & 8,879 \\ \hline 2022 & 8,062 & 8,650 & 9,005 & 8,799 & 9.119 & 9.075 & 8.812 & 9,115 & 8,847 & 8,807 & 8.827 & 8,596 \\ \hline 2023 & 8,282 & 8,715 & 9,007 & 8,996 & 9,105 & 9,279 & 9,013 & 9,299 & & & & \\ \hline \end{tabular} \begin{tabular}{|l|r|} \hline Date & Open \\ \hline 6/30/2023 & 107.49 \\ \hline 5/31/2023 & 101.75 \\ \hline 4/30/2023 & 115.99 \\ \hline 3/31/2023 & 113.39 \\ \hline 3/1/2023 & 109.31 \\ \hline 2/1/2023 & 115.83 \\ \hline 1/1/2023 & 109.78 \\ \hline 12/1/2022 & 111.64 \\ \hline 10/31/2022 & 112.37 \\ \hline 9/30/2022 & 90.04 \\ \hline 8/31/2022 & 94.42 \\ \hline 7/31/2022 & 94.79 \\ \hline 6/30/2022 & 86.74 \\ \hline 5/31/2022 & 97.02 \\ \hline 4/30/2022 & 85.01 \\ \hline 3/31/2022 & 81.99 \\ \hline 3/1/2022 & 78.77 \\ \hline 2/1/2022 & 76.45 \\ \hline 1/1/2022 & 61.24 \\ \hline 12/1/2021 & 60.9= \\ \hline 10/31/2021 & 65.07 \\ \hline 9/30/2021 & 59.41 \\ \hline 8/31/2021 & 54.49 \\ \hline 7/21/2021 & 9 \\ \hline \end{tabular} \begin{tabular}{|l|l|} \hline 8/31/2021 & 54.49 \\ \hline 7/31/2021 & 57.55 \\ \hline 6/30/2021 & 64.33 \\ \hline 5/31/2021 & 59.45 \\ \hline 4/30/2021 & 57.98 \\ \hline 3/31/2021 & 56.32 \\ \hline 3/1/2021 & 56.47 \\ \hline 2/1/2021 & 45.58 \\ \hline 1/1/2021 & 41.45 \\ \hline 12/1/2020 & 38.96 \\ \hline 10/31/2020 & 33.14 \\ \hline 9/30/2020 & 33.79 \\ \hline 8/31/2020 & 39.75 \\ \hline 7/31/2020 & 42.05 \\ \hline 6/30/2020 & 44.49 \\ \hline 5/31/2020 & 45.32 \\ \hline 4/30/2020 & 45.63 \\ \hline 3/31/2020 & 36.86 \\ \hline 3/1/2020 & 52.59 \\ \hline 2/1/2020 & 61.38 \\ \hline 1/1/2020 & 70.24 \\ \hline \end{tabular}