List of busiest airports by cargo traffic

Columns: Rank | Airport | Location | Code ( IATA/ICAO ) | Total Cargo ( tonnes ) | % Change
15 | Singapore Changi Airport | Changi , East Region , Singapore | SIN/WSSS | 1,886,999 | 2.2% | 16 | Amsterdam Airport Schiphol | Haarlemmermeer , North Holland , Netherlands | AMS/EHAM | 1,655,354 | 0.9% | 17 | Chicago O'Hare International Airport | Chicago , Illinois , United States | ORD/KORD | 1,592,826 | 15.6% | 18 | London Heathrow International Airport | Hayes , Hillingdon , Greater London , United Kingdom | LHR/EGLL | 1,591,637 | 0.2% | 19 | Guangzhou Baiyun International Airport | Baiyun - Huadu , Guangzhou , Guangdong , China | CAN/ZGGG | 1,537,759 | 5.8% | 20 | Hamad International Airport | Doha , Qatar | DOH/OTBD | 1,454,952 | 46.0%

Example questions:
What is the county location of the 2015 busiest airports by cargo traffic that moves 4,290,638 tons of cargo per year ? | How many are employed by the 2015 busiest airports by cargo traffic that moves the most tons of cargo every year ? | How many weekly flights were operated by the 2015 busiest airports by cargo traffic that moves 2,506,092 tons of cargo per in 2016 ? | What is the FAA classification of the 2015 busiest airports by cargo traffic that moves 2,630,701 tons of cargo per year ?

Answers:
Shelby County | 65,000 | 7,700 | medium-hub primary commercial service facility