  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $18.67 |   | $20.47 | 
  | -$1.80 | 
| 2015 | $18.20 | +2.6% | $19.95 | 
+2.6% | -$1.75 | 
| 2014 | $17.86 | +1.9% | $19.58 | 
+1.9% | -$1.72 | 
| 2013 | $17.51 | +1.9% | $19.20 | 
+1.9% | -$1.68 | 
| 2012 | $17.17 | +2.0% | $18.83 | 
+2.0% | -$1.65 | 
| 2011 | $16.91 | +1.6% | $18.54 | 
+1.6% | -$1.63 | 
| 2010 | $16.61 | +1.8% | $18.21 | 
+1.8% | -$1.60 | 
| 2009 | $16.43 | +1.1% | $18.02 | 
+1.1% | -$1.58 | 
| 2008 | $15.94 | +3.1% | $17.48 | 
+3.1% | -$1.53 | 
| 2007 | $15.41 | +3.5% | $16.90 | 
+3.5% | -$1.48 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $18.67 |   | $19.32 | 
  | -$0.64 | 
| 2015 | $18.20 | +2.6% | $18.78 | 
+2.9% | -$0.58 | 
| 2014 | $17.86 | +1.9% | $18.38 | 
+2.2% | -$0.52 | 
| 2013 | $17.51 | +1.9% | $18.01 | 
+2.1% | -$0.49 | 
| 2012 | $17.17 | +2.0% | $17.70 | 
+1.7% | -$0.52 | 
| 2011 | $16.91 | +1.6% | $17.42 | 
+1.6% | -$0.51 | 
| 2010 | $16.61 | +1.8% | $17.13 | 
+1.7% | -$0.51 | 
| 2009 | $16.43 | +1.1% | $16.90 | 
+1.4% | -$0.46 | 
| 2008 | $15.94 | +3.1% | $16.46 | 
+2.6% | -$0.51 | 
| 2007 | $15.41 | +3.5% | $15.94 | 
+3.3% | -$0.52 | 
  | 
| Reference Date: 1st Quarter 2016 |