World Trade, by century? Paging history buffs.

I'm trying to put together a list of the largest trade commodity, by value, per century. My guesses are below. And yes, I know they have a western bias.

1st century - olive oil, wine, slaves, salt, grain, lumber
2nd century - olive oil, wine, slaves, salt, grain, lumber
3rd century - olive oil, wine, slaves, salt, grain, lumber
4th century - olive oil, wine, slaves, salt, grain, lumber
5th century - olive oil, wine, slaves, salt, grain, lumber
6th century - olive oil, wine, slaves, salt, grain, lumber
7th century - olive oil, wine, slaves, salt, lumber
8th century - olive oil, wine, slaves, salt, lumber
9th century - olive oil, wine, slaves, salt, lumber
10th century - spices from the orient, silk, salt,
11th century - spices from the orient, silk, salt,
12th century - spices from the orient, silk, salt,
13th century - spices from the orient, silk, salt,
14th century - spices from the orient, silk, salt,
15th century - spices from the orient, silk, salt,
16th century - spices from the orient, slaves, silk
17th century - spices from the orient, slaves, sugar, tulips, tobacco,
18th century - slaves, sugar, tobacco, tea, opium
19th century - tea, sugar, tobacco, cotton, metals, opium
20th century - oil, metals, cocaine, coffee
21st century - oil,
22nd century - bots,

Any input is appreciated.

I'll update this list as people reply.