  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $21.14 |   | $24.44 | 
  | -$3.30 | 
| 2015 | $20.61 | +2.5% | $23.83 | 
+2.5% | -$3.21 | 
| 2014 | $20.19 | +2.1% | $23.34 | 
+2.1% | -$3.15 | 
| 2013 | $19.77 | +2.1% | $22.85 | 
+2.1% | -$3.08 | 
| 2012 | $19.48 | +1.5% | $22.52 | 
+1.5% | -$3.04 | 
| 2011 | $19.06 | +2.2% | $22.03 | 
+2.2% | -$2.97 | 
| 2010 | $18.84 | +1.2% | $21.78 | 
+1.2% | -$2.94 | 
| 2009 | $18.51 | +1.7% | $21.40 | 
+1.7% | -$2.89 | 
| 2008 | $17.97 | +3.0% | $20.78 | 
+3.0% | -$2.80 | 
| 2007 | $17.45 | +3.0% | $20.17 | 
+3.0% | -$2.72 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $21.14 |   | $20.85 | 
  | $0.29 | 
| 2015 | $20.61 | +2.5% | $20.27 | 
+2.9% | $0.35 | 
| 2014 | $20.19 | +2.1% | $19.83 | 
+2.2% | $0.36 | 
| 2013 | $19.77 | +2.1% | $19.43 | 
+2.1% | $0.33 | 
| 2012 | $19.48 | +1.5% | $19.10 | 
+1.7% | $0.38 | 
| 2011 | $19.06 | +2.2% | $18.80 | 
+1.6% | $0.26 | 
| 2010 | $18.84 | +1.2% | $18.48 | 
+1.7% | $0.35 | 
| 2009 | $18.51 | +1.7% | $18.23 | 
+1.4% | $0.28 | 
| 2008 | $17.97 | +3.0% | $17.77 | 
+2.6% | $0.21 | 
| 2007 | $17.45 | +3.0% | $17.20 | 
+3.3% | $0.25 | 
  | 
| Reference Date: 1st Quarter 2016 |