  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $22.56 |   | $28.62 | 
  | -$6.06 | 
| 2015 | $21.99 | +2.6% | $27.89 | 
+2.6% | -$5.90 | 
| 2014 | $21.58 | +1.9% | $27.37 | 
+1.9% | -$5.79 | 
| 2013 | $21.16 | +1.9% | $26.85 | 
+1.9% | -$5.68 | 
| 2012 | $20.75 | +2.0% | $26.33 | 
+2.0% | -$5.57 | 
| 2011 | $20.43 | +1.6% | $25.92 | 
+1.6% | -$5.48 | 
| 2010 | $20.07 | +1.8% | $25.46 | 
+1.8% | -$5.39 | 
| 2009 | $19.86 | +1.1% | $25.19 | 
+1.1% | -$5.33 | 
| 2008 | $19.27 | +3.1% | $24.44 | 
+3.1% | -$5.17 | 
| 2007 | $18.62 | +3.5% | $23.62 | 
+3.5% | -$5.00 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $22.56 |   | $20.85 | 
  | $1.71 | 
| 2015 | $21.99 | +2.6% | $20.27 | 
+2.9% | $1.72 | 
| 2014 | $21.58 | +1.9% | $19.83 | 
+2.2% | $1.74 | 
| 2013 | $21.16 | +1.9% | $19.43 | 
+2.1% | $1.73 | 
| 2012 | $20.75 | +2.0% | $19.10 | 
+1.7% | $1.65 | 
| 2011 | $20.43 | +1.6% | $18.80 | 
+1.6% | $1.63 | 
| 2010 | $20.07 | +1.8% | $18.48 | 
+1.7% | $1.59 | 
| 2009 | $19.86 | +1.1% | $18.23 | 
+1.4% | $1.62 | 
| 2008 | $19.27 | +3.1% | $17.77 | 
+2.6% | $1.50 | 
| 2007 | $18.62 | +3.5% | $17.20 | 
+3.3% | $1.42 | 
  | 
| Reference Date: 1st Quarter 2016 |