  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $23.04 |   | $20.50 | 
  | $2.54 | 
| 2015 | $22.31 | +3.3% | $19.85 | 
+3.3% | $2.46 | 
| 2014 | $21.80 | +2.3% | $19.40 | 
+2.3% | $2.40 | 
| 2013 | $21.39 | +1.9% | $19.03 | 
+1.9% | $2.36 | 
| 2012 | $21.04 | +1.7% | $18.72 | 
+1.7% | $2.32 | 
| 2011 | $20.70 | +1.6% | $18.42 | 
+1.6% | $2.28 | 
| 2010 | $20.47 | +1.1% | $18.22 | 
+1.1% | $2.26 | 
| 2009 | $20.12 | +1.8% | $17.90 | 
+1.8% | $2.22 | 
| 2008 | $19.59 | +2.7% | $17.43 | 
+2.7% | $2.16 | 
| 2007 | $19.14 | +2.3% | $17.03 | 
+2.3% | $2.11 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $23.04 |   | $20.53 | 
  | $2.51 | 
| 2015 | $22.31 | +3.3% | $19.96 | 
+2.9% | $2.35 | 
| 2014 | $21.80 | +2.3% | $19.53 | 
+2.2% | $2.27 | 
| 2013 | $21.39 | +1.9% | $19.14 | 
+2.1% | $2.26 | 
| 2012 | $21.04 | +1.7% | $18.81 | 
+1.7% | $2.23 | 
| 2011 | $20.70 | +1.6% | $18.51 | 
+1.6% | $2.19 | 
| 2010 | $20.47 | +1.1% | $18.20 | 
+1.7% | $2.27 | 
| 2009 | $20.12 | +1.8% | $17.95 | 
+1.4% | $2.16 | 
| 2008 | $19.59 | +2.7% | $17.49 | 
+2.6% | $2.10 | 
| 2007 | $19.14 | +2.3% | $16.94 | 
+3.3% | $2.21 | 
  | 
| Reference Date: 1st Quarter 2016 |