forbes_2018 = forbes_2018_raw.rename({ rank: 'rank_2018' },
{ revenues_billion_usd: 'sales_billion_usd_2018' },
{ profits_billion_usd: 'profits_billion_usd_2018'},
{ assets_billion_usd: 'assests_billion_usd_2018'},
{ market_value_billion_usd: 'market_value_billion_usd_2018'},
{ ceo: 'ceo_2018'})