  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $20.76 |   | $19.44 | 
  | $1.32 | 
| 2015 | $20.01 | +3.8% | $18.74 | 
+3.8% | $1.27 | 
| 2014 | $19.62 | +2.0% | $18.37 | 
+2.0% | $1.25 | 
| 2013 | $19.22 | +2.0% | $18.00 | 
+2.0% | $1.22 | 
| 2012 | $18.90 | +1.7% | $17.70 | 
+1.7% | $1.20 | 
| 2011 | $18.55 | +1.8% | $17.38 | 
+1.8% | $1.18 | 
| 2010 | $18.26 | +1.6% | $17.10 | 
+1.6% | $1.16 | 
| 2009 | $17.92 | +1.9% | $16.78 | 
+1.9% | $1.14 | 
| 2008 | $17.43 | +2.8% | $16.32 | 
+2.8% | $1.11 | 
| 2007 | $16.87 | +3.3% | $15.80 | 
+3.3% | $1.07 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $20.76 |   | $20.85 | 
  | -$0.09 | 
| 2015 | $20.01 | +3.8% | $20.27 | 
+2.9% | -$0.25 | 
| 2014 | $19.62 | +2.0% | $19.83 | 
+2.2% | -$0.21 | 
| 2013 | $19.22 | +2.0% | $19.43 | 
+2.1% | -$0.20 | 
| 2012 | $18.90 | +1.7% | $19.10 | 
+1.7% | -$0.20 | 
| 2011 | $18.55 | +1.8% | $18.80 | 
+1.6% | -$0.24 | 
| 2010 | $18.26 | +1.6% | $18.48 | 
+1.7% | -$0.22 | 
| 2009 | $17.92 | +1.9% | $18.23 | 
+1.4% | -$0.31 | 
| 2008 | $17.43 | +2.8% | $17.77 | 
+2.6% | -$0.33 | 
| 2007 | $16.87 | +3.3% | $17.20 | 
+3.3% | -$0.32 | 
  | 
| Reference Date: 1st Quarter 2016 |