wdt_ID	Series	Years: From	Years: To	Number of Countries	Unit	Industry Classification	Number of Goods
1	Colonial Relationship since 1945			225	0/1	da
7	Common Colonizers			225	0/1	da
8	Common Colonizers since 1945			225	0/1	da
9	Common Language			225	0/1	da
10	Common Secondary Language			225	0/1	da
11	Contiguity			225	0/1	da
12	Current Colonial Relationship			225	0/1	da
13	Distance Between Capitals			225	km	da
14	Distance Between Populated Cities			225	km	da
15	Landlocked			225	0/1	da