  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $21.92 |   | $23.15 | 
  | -$1.22 | 
| 2015 | $21.38 | +2.5% | $22.57 | 
+2.5% | -$1.19 | 
| 2014 | $20.94 | +2.1% | $22.11 | 
+2.1% | -$1.17 | 
| 2013 | $20.50 | +2.1% | $21.65 | 
+2.1% | -$1.15 | 
| 2012 | $20.20 | +1.5% | $21.33 | 
+1.5% | -$1.13 | 
| 2011 | $19.76 | +2.2% | $20.87 | 
+2.2% | -$1.10 | 
| 2010 | $19.53 | +1.2% | $20.63 | 
+1.2% | -$1.09 | 
| 2009 | $19.20 | +1.7% | $20.27 | 
+1.7% | -$1.07 | 
| 2008 | $18.64 | +3.0% | $19.68 | 
+3.0% | -$1.04 | 
| 2007 | $18.09 | +3.0% | $19.11 | 
+3.0% | -$1.01 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $21.92 |   | $20.53 | 
  | $1.39 | 
| 2015 | $21.38 | +2.5% | $19.96 | 
+2.9% | $1.42 | 
| 2014 | $20.94 | +2.1% | $19.53 | 
+2.2% | $1.41 | 
| 2013 | $20.50 | +2.1% | $19.14 | 
+2.1% | $1.36 | 
| 2012 | $20.20 | +1.5% | $18.81 | 
+1.7% | $1.39 | 
| 2011 | $19.76 | +2.2% | $18.51 | 
+1.6% | $1.25 | 
| 2010 | $19.53 | +1.2% | $18.20 | 
+1.7% | $1.33 | 
| 2009 | $19.20 | +1.7% | $17.95 | 
+1.4% | $1.24 | 
| 2008 | $18.64 | +3.0% | $17.49 | 
+2.6% | $1.14 | 
| 2007 | $18.09 | +3.0% | $16.94 | 
+3.3% | $1.16 | 
  | 
| Reference Date: 1st Quarter 2016 |