Use Bloomberg (see access details).

• Type ECTR and hit <GO> to access Bloomberg Trade Flow.
• Tables and graphs for world trade including data on total trade, surplus/deficit trade, exports/imports and net exports.
• Time series start in 1980 and include yearly, quarterly and monthly data.
• Geographic detail include geographic regions, 251 countries, and geopolitical regions such as BRICS and the EU. Does not include product detail.

Use Global Financial Data to retrieve historical to current export and import data.

• Filter by series category: International Trade
• Filter by series type: Exports and Imports
• make additional selections for Country/Group, Main Indicator, Start Year, and End Year
• Click the Search button to view list of results
• Includes Total Goods and Services categories; does not break down to individual goods or services. 

Look at UN Comtrade.

• To customize your data query on Comtrade, click Account Info and enter your email address.
• Click Data Query and then Express Selection.
• You can request a time series of exports and imports as far back as 1962 -- use the SITC Rev.1 Classification.
• For total exports and imports, enter total under Commodity Codes/Text . You can also enter a Reporting Country and a Partner Country.
   

Use these resources from the International Monetary Fund:

• Direction of Trade Statistics publication
• Direction of Trade Statistics data

Direction of Trade Statistics data is also available through Sage Data:

• In the Browse Data by box, click the Source tab.
• Select International Monetary Fund (IMF). 
• Expand Direction of Trade Statistics to view available data.

For tariff information go to Interactive Tariff and Trade Dataweb - USITC.

Try additional resources listed on the International Trade Statistics page of Lippincott Library's Importing and Exporting research guide.