  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $22.43 |   | $19.53 | 
  | $2.90 | 
| 2015 | $21.62 | +3.8% | $18.82 | 
+3.8% | $2.80 | 
| 2014 | $21.19 | +2.0% | $18.45 | 
+2.0% | $2.74 | 
| 2013 | $20.77 | +2.0% | $18.09 | 
+2.0% | $2.69 | 
| 2012 | $20.42 | +1.7% | $17.78 | 
+1.7% | $2.64 | 
| 2011 | $20.05 | +1.8% | $17.46 | 
+1.8% | $2.59 | 
| 2010 | $19.73 | +1.6% | $17.18 | 
+1.6% | $2.55 | 
| 2009 | $19.36 | +1.9% | $16.86 | 
+1.9% | $2.50 | 
| 2008 | $18.83 | +2.8% | $16.40 | 
+2.8% | $2.43 | 
| 2007 | $18.23 | +3.3% | $15.87 | 
+3.3% | $2.36 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $22.43 |   | $21.85 | 
  | $0.58 | 
| 2015 | $21.62 | +3.8% | $21.24 | 
+2.9% | $0.38 | 
| 2014 | $21.19 | +2.0% | $20.78 | 
+2.2% | $0.41 | 
| 2013 | $20.77 | +2.0% | $20.37 | 
+2.1% | $0.41 | 
| 2012 | $20.42 | +1.7% | $20.02 | 
+1.7% | $0.40 | 
| 2011 | $20.05 | +1.8% | $19.70 | 
+1.6% | $0.35 | 
| 2010 | $19.73 | +1.6% | $19.37 | 
+1.7% | $0.36 | 
| 2009 | $19.36 | +1.9% | $19.11 | 
+1.4% | $0.25 | 
| 2008 | $18.83 | +2.8% | $18.62 | 
+2.6% | $0.21 | 
| 2007 | $18.23 | +3.3% | $18.02 | 
+3.3% | $0.20 | 
  | 
| Reference Date: 1st Quarter 2016 |