The most frequently cited reason for respondents' most recent raise was performance. Receiving another job offer was cited almost twice as often as earning a promotion as a factor in raises. Frequency of raises. Amount of raise. Reasons for raise.
Bonuses seem to be tied to company performance more than individual performance.
Tables 23-25 give a portrait of bonus distribution. Percent of respondents awarded bonuses. Amount of bonus. Reasons for bonus. Happily, many have access to these benefits.