บริษัทใดมีการเติบโตของ ROI สูงสุดจากปี 2021 ถึง 2022?
 Which companies have the highest ROI growth from 2021 to 2022?
roi_growth_2021_2022 = pd.merge(data_2021[['Company', 'ROI']], data_2022[['Company', 'ROI']], on='Company', suffixes=('_2021', '_2022'))
roi_growth_2021_2022['ROI Growth'] = roi_growth_2021_2022['ROI_2022'] - roi_growth_2021_2022['ROI_2021']
highest_roi_growth_company = roi_growth_2021_2022[roi_growth_2021_2022['ROI Growth'] == roi_growth_2021_2022['ROI Growth'].max()]