  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $28.85 |   | $19.48 | 
  | $9.37 | 
| 2015 | $27.81 | +3.8% | $18.77 | 
+3.8% | $9.03 | 
| 2014 | $27.26 | +2.0% | $18.41 | 
+2.0% | $8.85 | 
| 2013 | $26.72 | +2.0% | $18.04 | 
+2.0% | $8.68 | 
| 2012 | $26.26 | +1.7% | $17.73 | 
+1.7% | $8.53 | 
| 2011 | $25.79 | +1.8% | $17.41 | 
+1.8% | $8.37 | 
| 2010 | $25.38 | +1.6% | $17.14 | 
+1.6% | $8.24 | 
| 2009 | $24.90 | +1.9% | $16.81 | 
+1.9% | $8.09 | 
| 2008 | $24.22 | +2.8% | $16.35 | 
+2.8% | $7.87 | 
| 2007 | $23.45 | +3.3% | $15.83 | 
+3.3% | $7.62 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $28.85 |   | $20.98 | 
  | $7.87 | 
| 2015 | $27.81 | +3.8% | $20.39 | 
+2.9% | $7.41 | 
| 2014 | $27.26 | +2.0% | $19.96 | 
+2.2% | $7.30 | 
| 2013 | $26.72 | +2.0% | $19.55 | 
+2.1% | $7.16 | 
| 2012 | $26.26 | +1.7% | $19.22 | 
+1.7% | $7.04 | 
| 2011 | $25.79 | +1.8% | $18.92 | 
+1.6% | $6.87 | 
| 2010 | $25.38 | +1.6% | $18.60 | 
+1.7% | $6.78 | 
| 2009 | $24.90 | +1.9% | $18.35 | 
+1.4% | $6.55 | 
| 2008 | $24.22 | +2.8% | $17.88 | 
+2.6% | $6.34 | 
| 2007 | $23.45 | +3.3% | $17.31 | 
+3.3% | $6.14 | 
  | 
| Reference Date: 1st Quarter 2016 |