wdt_ID	Series	Years: From	Years: To	Number of Countries	Unit	Industry Classification	Number of Goods
1	Bilateral trade	1962	2000	72	Current	4-digit SITC rev.2	1000
2	Bilateral trade	1962	2000	72	Weight	4-digit SITC rev.2	1000
3	Bilateral trade	1962	2000	72	Current	Aggregate	1000