Table 1 Number of Export/Import links in the bipartite graphs corresponding to each type of product, in 2019

1.- Energy

1.- Crude Oil

14/115

1915 / 1018

28,843 / 15,964

12.- Coal and petroleum coke

129/128

2.- Fueloil

77/74

3.- Diesel fuel

100/68

35.- Natural gas

12/47

4.- Gasoline

229/78

51.- Biofuels

675/230

6.- Other petroleum products

625/224

7.- Energy gases from petroleum

54/54

2.- Steelworks

10.- Other minerals and metal waste

362/347

2844 / 1856

11.- Iron scrap

72/153

13.- Steel products

1458/816

36.- Other metallurgical products

934/520

8.- Iron Ore

18/20

3.- Non-Metallic Ores

25.- Regular salt

270/53

955 / 328

52.- Other Non-Metallic Ores

685/275

4.- Fertilizers

14.- Phosphates

4/14

702 / 409

15.- Potash

106/56

16.- Natural and artificial fertilizers

592/339

5.- Chemical Products

17.- Chemical products

2758/1285

2758 / 1285

6.- Construction Materials

18.- Cement and clinker

205/44

2699 / 1015

20.- Elaborated construction materials

2365/932

5.- Asphalt

129/39

7.- Agricultural and Food

21.- Cereals and their flours

397/319

7689 / 4044

22.- Soya beans

9/42

23.- Fruits, vegetables, legumes

746/548

24.- Wines, beverages, alcohols and derivatives

1403/380

27.- Canned food

1042/428

28.- Tobacco, cocoa, coffee, spices

742/504

29.- Oils and Fats

969/303

30.- Other food products

1287/580

33.- Frozen and refrigerated fish

368/573

37.- Feed and forage

726/367

8.- Other Goods

19.- Wood and cork

705/400

7653 / 5109

26.- Paper and pulp

871/427

31.- Machine tool spare parts

2832/1773

34.- Rest of goods

3245/2509

9.- Vehicles and Transport Elements

32.- Automobiles and their Parts

1628/900

1628 / 900