  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $23.04 |   | $17.49 | 
  | $5.55 | 
| 2015 | $22.21 | +3.8% | $16.86 | 
+3.8% | $5.35 | 
| 2014 | $21.77 | +2.0% | $16.53 | 
+2.0% | $5.24 | 
| 2013 | $21.34 | +2.0% | $16.20 | 
+2.0% | $5.14 | 
| 2012 | $20.97 | +1.7% | $15.92 | 
+1.7% | $5.05 | 
| 2011 | $20.59 | +1.8% | $15.63 | 
+1.8% | $4.96 | 
| 2010 | $20.27 | +1.6% | $15.38 | 
+1.6% | $4.88 | 
| 2009 | $19.89 | +1.9% | $15.10 | 
+1.9% | $4.79 | 
| 2008 | $19.34 | +2.8% | $14.68 | 
+2.8% | $4.66 | 
| 2007 | $18.73 | +3.3% | $14.21 | 
+3.3% | $4.51 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $23.04 |   | $18.24 | 
  | $4.80 | 
| 2015 | $22.21 | +3.8% | $17.73 | 
+2.9% | $4.48 | 
| 2014 | $21.77 | +2.0% | $17.35 | 
+2.2% | $4.42 | 
| 2013 | $21.34 | +2.0% | $17.00 | 
+2.1% | $4.34 | 
| 2012 | $20.97 | +1.7% | $16.71 | 
+1.7% | $4.26 | 
| 2011 | $20.59 | +1.8% | $16.45 | 
+1.6% | $4.15 | 
| 2010 | $20.27 | +1.6% | $16.17 | 
+1.7% | $4.10 | 
| 2009 | $19.89 | +1.9% | $15.95 | 
+1.4% | $3.93 | 
| 2008 | $19.34 | +2.8% | $15.54 | 
+2.6% | $3.80 | 
| 2007 | $18.73 | +3.3% | $15.05 | 
+3.3% | $3.68 | 
  | 
| Reference Date: 1st Quarter 2016 |