Massachusetts and the other New England states could significant boost exports to South Korea, Colombia and Panama and create jobs across the region if Congress approves pending trade pacts with those countries, according to the New England Council. The business-backed group delivered letters this week to every member of the New England Congressional delegation, asking for their support. The council says thousands of jobs in the region are supported by trade, with the region’s worldwide export of goods and services totaling $56.2 billion in 2010, based on International Trade Administration estimates. Existing trade between the New England states and Colombia, Panama and South Korea supports more than 6,000 jobs in New England. “The free trade agreements with these nations have been very carefully negotiated to include a variety of measures that ensure American interests are protected and appropriate labor and human rights safeguards are in place,” council president James Brett said in a statement. Existing Massachusetts exports to the three countries that are the subject of the pending trade agreements total nearly $1 billion, with most of those exports headed to South Korea.