text: NaN                NaN               NaN             NaN       17          NaN                NaN               NaN             NaN       18         5.20  5th and 6th grade            133.58          131.54       19         8.28  6th and 7th grade            115.58          112.37       20         5.20  5th and 6th grade            133.58          131.54       21         8.28  6th and 7th grade            115.58          112.37       22         5.20  5th and 6th grade            133.58