ATHENS, June 9 (Xinhua) -- Greece's annual inflation rate jumped to 11.3 percent in May this year, reaching a 29-year record for the country. The increase is linked to a large extent to the rise in energy costs over the past year, the Hellenic Statistical Authority (ELSTAT) said on Thursday. Natural gas prices increased by 172.7 percent compared to a year ago, electricity prices by 80.2 percent and heatin