The ICC just released an excellent report on trade finance.
While the title suggests the report is about 2016, it's actually on 2015. The report is based on a survey, input from a range of third party public and private sector entities, and SWIFT-provided data.
The report is a comprehensive analysis of trends in the global economy, international and regional trade, various trade finance instruments (including forfaiting) supported by some 95 tables. SWIFT-provided data on letter of credit and collections messages sent, including data on average L/C size (including by regions with separate data for import and export L/Cs), proposed and rejected transactions by region and country (e.g., Russia).
There is literally something for everyone with an interest in global trade.
Well worth a close read.