  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $21.49 |   | $22.91 | 
  | -$1.42 | 
| 2015 | $20.94 | +2.6% | $22.33 | 
+2.6% | -$1.38 | 
| 2014 | $20.55 | +1.9% | $21.91 | 
+1.9% | -$1.35 | 
| 2013 | $20.16 | +1.9% | $21.49 | 
+1.9% | -$1.33 | 
| 2012 | $19.77 | +2.0% | $21.07 | 
+2.0% | -$1.30 | 
| 2011 | $19.46 | +1.6% | $20.75 | 
+1.6% | -$1.28 | 
| 2010 | $19.12 | +1.8% | $20.38 | 
+1.8% | -$1.26 | 
| 2009 | $18.91 | +1.1% | $20.16 | 
+1.1% | -$1.24 | 
| 2008 | $18.35 | +3.1% | $19.56 | 
+3.1% | -$1.21 | 
| 2007 | $17.74 | +3.5% | $18.91 | 
+3.5% | -$1.17 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $21.49 |   | $20.85 | 
  | $0.64 | 
| 2015 | $20.94 | +2.6% | $20.27 | 
+2.9% | $0.68 | 
| 2014 | $20.55 | +1.9% | $19.83 | 
+2.2% | $0.72 | 
| 2013 | $20.16 | +1.9% | $19.43 | 
+2.1% | $0.73 | 
| 2012 | $19.77 | +2.0% | $19.10 | 
+1.7% | $0.67 | 
| 2011 | $19.46 | +1.6% | $18.80 | 
+1.6% | $0.66 | 
| 2010 | $19.12 | +1.8% | $18.48 | 
+1.7% | $0.64 | 
| 2009 | $18.91 | +1.1% | $18.23 | 
+1.4% | $0.68 | 
| 2008 | $18.35 | +3.1% | $17.77 | 
+2.6% | $0.59 | 
| 2007 | $17.74 | +3.5% | $17.20 | 
+3.3% | $0.54 | 
  | 
| Reference Date: 1st Quarter 2016 |