  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $21.31 |   | $22.53 | 
  | -$1.22 | 
| 2015 | $20.78 | +2.5% | $21.97 | 
+2.5% | -$1.18 | 
| 2014 | $20.35 | +2.1% | $21.52 | 
+2.1% | -$1.16 | 
| 2013 | $19.93 | +2.1% | $21.07 | 
+2.1% | -$1.14 | 
| 2012 | $19.64 | +1.5% | $20.76 | 
+1.5% | -$1.12 | 
| 2011 | $19.21 | +2.2% | $20.31 | 
+2.2% | -$1.09 | 
| 2010 | $18.99 | +1.2% | $20.07 | 
+1.2% | -$1.08 | 
| 2009 | $18.66 | +1.7% | $19.73 | 
+1.7% | -$1.06 | 
| 2008 | $18.12 | +3.0% | $19.15 | 
+3.0% | -$1.03 | 
| 2007 | $17.59 | +3.0% | $18.59 | 
+3.0% | -$1.00 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $21.31 |   | $21.85 | 
  | -$0.54 | 
| 2015 | $20.78 | +2.5% | $21.24 | 
+2.9% | -$0.45 | 
| 2014 | $20.35 | +2.1% | $20.78 | 
+2.2% | -$0.43 | 
| 2013 | $19.93 | +2.1% | $20.37 | 
+2.1% | -$0.43 | 
| 2012 | $19.64 | +1.5% | $20.02 | 
+1.7% | -$0.37 | 
| 2011 | $19.21 | +2.2% | $19.70 | 
+1.6% | -$0.49 | 
| 2010 | $18.99 | +1.2% | $19.37 | 
+1.7% | -$0.38 | 
| 2009 | $18.66 | +1.7% | $19.11 | 
+1.4% | -$0.44 | 
| 2008 | $18.12 | +3.0% | $18.62 | 
+2.6% | -$0.50 | 
| 2007 | $17.59 | +3.0% | $18.02 | 
+3.3% | -$0.43 | 
  | 
| Reference Date: 1st Quarter 2016 |