U.S. workers can expect a median base salary increase of 3 percent in 2015 across all main employee categories and most industries, still below pre-recession levels, according to separate research findings by pay consultancy Hay Group and WorldatWork, an association of total rewards professionals.

Preliminary results from the WorldatWork 2014-2015 Salary Budget Survey, published on July 8, show actual 2014 and projected 2015 salary budgets in the U.S. as follows:

Total U.S. Salary Budget Increases

Oil and gas industry employees can expect a median base salary increase of 4 percent in 2015.

Hospital employees can expect an increase of 2 percent for most employee groups in 2015.

Reference : Base Salary Rise of 3% Forecast for 2015 By Stephen Miller, CEBS 7/9/2014 , SHRM.org