  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $21.62 |   | $19.17 | 
  | $2.45 | 
| 2015 | $20.93 | +3.3% | $18.56 | 
+3.3% | $2.37 | 
| 2014 | $20.46 | +2.3% | $18.14 | 
+2.3% | $2.32 | 
| 2013 | $20.07 | +1.9% | $17.80 | 
+1.9% | $2.27 | 
| 2012 | $19.74 | +1.7% | $17.50 | 
+1.7% | $2.24 | 
| 2011 | $19.42 | +1.6% | $17.22 | 
+1.6% | $2.20 | 
| 2010 | $19.21 | +1.1% | $17.03 | 
+1.1% | $2.18 | 
| 2009 | $18.88 | +1.8% | $16.74 | 
+1.8% | $2.14 | 
| 2008 | $18.39 | +2.7% | $16.30 | 
+2.7% | $2.08 | 
| 2007 | $17.96 | +2.3% | $15.93 | 
+2.3% | $2.04 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $21.62 |   | $23.35 | 
  | -$1.73 | 
| 2015 | $20.93 | +3.3% | $22.70 | 
+2.9% | -$1.76 | 
| 2014 | $20.46 | +2.3% | $22.21 | 
+2.2% | -$1.75 | 
| 2013 | $20.07 | +1.9% | $21.76 | 
+2.1% | -$1.69 | 
| 2012 | $19.74 | +1.7% | $21.39 | 
+1.7% | -$1.65 | 
| 2011 | $19.42 | +1.6% | $21.05 | 
+1.6% | -$1.63 | 
| 2010 | $19.21 | +1.1% | $20.70 | 
+1.7% | -$1.48 | 
| 2009 | $18.88 | +1.8% | $20.42 | 
+1.4% | -$1.54 | 
| 2008 | $18.39 | +2.7% | $19.90 | 
+2.6% | -$1.51 | 
| 2007 | $17.96 | +2.3% | $19.26 | 
+3.3% | -$1.29 | 
  | 
| Reference Date: 1st Quarter 2016 |