  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $15.71 |   | $19.44 | 
  | -$3.73 | 
| 2015 | $15.14 | +3.8% | $18.74 | 
+3.8% | -$3.59 | 
| 2014 | $14.84 | +2.0% | $18.37 | 
+2.0% | -$3.52 | 
| 2013 | $14.55 | +2.0% | $18.00 | 
+2.0% | -$3.45 | 
| 2012 | $14.30 | +1.7% | $17.70 | 
+1.7% | -$3.39 | 
| 2011 | $14.04 | +1.8% | $17.38 | 
+1.8% | -$3.33 | 
| 2010 | $13.82 | +1.6% | $17.10 | 
+1.6% | -$3.28 | 
| 2009 | $13.56 | +1.9% | $16.78 | 
+1.9% | -$3.21 | 
| 2008 | $13.19 | +2.8% | $16.32 | 
+2.8% | -$3.13 | 
| 2007 | $12.77 | +3.3% | $15.80 | 
+3.3% | -$3.03 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $15.71 |   | $20.85 | 
  | -$5.14 | 
| 2015 | $15.14 | +3.8% | $20.27 | 
+2.9% | -$5.12 | 
| 2014 | $14.84 | +2.0% | $19.83 | 
+2.2% | -$4.98 | 
| 2013 | $14.55 | +2.0% | $19.43 | 
+2.1% | -$4.88 | 
| 2012 | $14.30 | +1.7% | $19.10 | 
+1.7% | -$4.79 | 
| 2011 | $14.04 | +1.8% | $18.80 | 
+1.6% | -$4.75 | 
| 2010 | $13.82 | +1.6% | $18.48 | 
+1.7% | -$4.66 | 
| 2009 | $13.56 | +1.9% | $18.23 | 
+1.4% | -$4.67 | 
| 2008 | $13.19 | +2.8% | $17.77 | 
+2.6% | -$4.57 | 
| 2007 | $12.77 | +3.3% | $17.20 | 
+3.3% | -$4.43 | 
  | 
| Reference Date: 1st Quarter 2016 |