  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $18.44 |   | $22.91 | 
  | -$4.47 | 
| 2015 | $17.97 | +2.6% | $22.33 | 
+2.6% | -$4.35 | 
| 2014 | $17.64 | +1.9% | $21.91 | 
+1.9% | -$4.27 | 
| 2013 | $17.30 | +1.9% | $21.49 | 
+1.9% | -$4.19 | 
| 2012 | $16.96 | +2.0% | $21.07 | 
+2.0% | -$4.11 | 
| 2011 | $16.70 | +1.6% | $20.75 | 
+1.6% | -$4.04 | 
| 2010 | $16.41 | +1.8% | $20.38 | 
+1.8% | -$3.97 | 
| 2009 | $16.23 | +1.1% | $20.16 | 
+1.1% | -$3.93 | 
| 2008 | $15.75 | +3.1% | $19.56 | 
+3.1% | -$3.81 | 
| 2007 | $15.22 | +3.5% | $18.91 | 
+3.5% | -$3.68 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $18.44 |   | $20.85 | 
  | -$2.41 | 
| 2015 | $17.97 | +2.6% | $20.27 | 
+2.9% | -$2.29 | 
| 2014 | $17.64 | +1.9% | $19.83 | 
+2.2% | -$2.19 | 
| 2013 | $17.30 | +1.9% | $19.43 | 
+2.1% | -$2.13 | 
| 2012 | $16.96 | +2.0% | $19.10 | 
+1.7% | -$2.13 | 
| 2011 | $16.70 | +1.6% | $18.80 | 
+1.6% | -$2.10 | 
| 2010 | $16.41 | +1.8% | $18.48 | 
+1.7% | -$2.07 | 
| 2009 | $16.23 | +1.1% | $18.23 | 
+1.4% | -$2.00 | 
| 2008 | $15.75 | +3.1% | $17.77 | 
+2.6% | -$2.01 | 
| 2007 | $15.22 | +3.5% | $17.20 | 
+3.3% | -$1.97 | 
  | 
| Reference Date: 1st Quarter 2016 |