  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $20.73 |   | $24.50 | 
  | -$3.77 | 
| 2015 | $20.22 | +2.5% | $23.89 | 
+2.5% | -$3.67 | 
| 2014 | $19.80 | +2.1% | $23.40 | 
+2.1% | -$3.60 | 
| 2013 | $19.38 | +2.1% | $22.91 | 
+2.1% | -$3.52 | 
| 2012 | $19.10 | +1.5% | $22.58 | 
+1.5% | -$3.47 | 
| 2011 | $18.69 | +2.2% | $22.09 | 
+2.2% | -$3.39 | 
| 2010 | $18.47 | +1.2% | $21.83 | 
+1.2% | -$3.35 | 
| 2009 | $18.16 | +1.7% | $21.46 | 
+1.7% | -$3.30 | 
| 2008 | $17.62 | +3.0% | $20.83 | 
+3.0% | -$3.20 | 
| 2007 | $17.11 | +3.0% | $20.22 | 
+3.0% | -$3.11 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $20.73 |   | $23.35 | 
  | -$2.62 | 
| 2015 | $20.22 | +2.5% | $22.70 | 
+2.9% | -$2.48 | 
| 2014 | $19.80 | +2.1% | $22.21 | 
+2.2% | -$2.41 | 
| 2013 | $19.38 | +2.1% | $21.76 | 
+2.1% | -$2.37 | 
| 2012 | $19.10 | +1.5% | $21.39 | 
+1.7% | -$2.28 | 
| 2011 | $18.69 | +2.2% | $21.05 | 
+1.6% | -$2.36 | 
| 2010 | $18.47 | +1.2% | $20.70 | 
+1.7% | -$2.22 | 
| 2009 | $18.16 | +1.7% | $20.42 | 
+1.4% | -$2.26 | 
| 2008 | $17.62 | +3.0% | $19.90 | 
+2.6% | -$2.27 | 
| 2007 | $17.11 | +3.0% | $19.26 | 
+3.3% | -$2.15 | 
  | 
| Reference Date: 1st Quarter 2016 |