Hi, been working in a stat board for 6yrs as mx12 and getting only average grade every yr. However, this yr I was given $278 annual increment for a C grade thou (unusually higher annual increment from past yrs).

Can I know under what kinda circumstances wld an officer get this kinda higher than usual annual increment? What's the chance of promotion? Been feeling rather demoralized with no progress all these yrs thou been performing well acc to my supervisor