According to the latest graduate employment survey conducted by the 5 polytechnics, the median gross monthly salary of poly graduates have gone up by 2.8 per cent or $50 compared to 2010 figures.  That means poly graduates who completed their studies in 2011 and not liable for National Service could command a salary of S$1,850.  Those with National Service earned a median gross monthly salary of S$2,100 compared to S$2,000. The overall employment rate was also relatively high at 94.7% though it was down from 2010 figures of 95.4% Poly graduates who commanded the higher salaries studied Health Science and Built Environment, and Engineering & Maritime......