  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $21.83 |   | $19.21 | 
  | $2.62 | 
| 2015 | $21.14 | +3.3% | $18.60 | 
+3.3% | $2.54 | 
| 2014 | $20.66 | +2.3% | $18.18 | 
+2.3% | $2.48 | 
| 2013 | $20.27 | +1.9% | $17.84 | 
+1.9% | $2.43 | 
| 2012 | $19.93 | +1.7% | $17.54 | 
+1.7% | $2.39 | 
| 2011 | $19.61 | +1.6% | $17.26 | 
+1.6% | $2.35 | 
| 2010 | $19.40 | +1.1% | $17.07 | 
+1.1% | $2.33 | 
| 2009 | $19.06 | +1.8% | $16.77 | 
+1.8% | $2.29 | 
| 2008 | $18.56 | +2.7% | $16.34 | 
+2.7% | $2.23 | 
| 2007 | $18.14 | +2.3% | $15.96 | 
+2.3% | $2.18 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $21.83 |   | $21.85 | 
  | -$0.02 | 
| 2015 | $21.14 | +3.3% | $21.24 | 
+2.9% | -$0.10 | 
| 2014 | $20.66 | +2.3% | $20.78 | 
+2.2% | -$0.12 | 
| 2013 | $20.27 | +1.9% | $20.37 | 
+2.1% | -$0.09 | 
| 2012 | $19.93 | +1.7% | $20.02 | 
+1.7% | -$0.08 | 
| 2011 | $19.61 | +1.6% | $19.70 | 
+1.6% | -$0.09 | 
| 2010 | $19.40 | +1.1% | $19.37 | 
+1.7% | $0.03 | 
| 2009 | $19.06 | +1.8% | $19.11 | 
+1.4% | -$0.04 | 
| 2008 | $18.56 | +2.7% | $18.62 | 
+2.6% | -$0.05 | 
| 2007 | $18.14 | +2.3% | $18.02 | 
+3.3% | $0.11 | 
  | 
| Reference Date: 1st Quarter 2016 |