  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $21.23 |   | $17.86 | 
  | $3.37 | 
| 2015 | $20.56 | +3.3% | $17.29 | 
+3.3% | $3.26 | 
| 2014 | $20.09 | +2.3% | $16.90 | 
+2.3% | $3.19 | 
| 2013 | $19.71 | +1.9% | $16.58 | 
+1.9% | $3.13 | 
| 2012 | $19.38 | +1.7% | $16.31 | 
+1.7% | $3.08 | 
| 2011 | $19.07 | +1.6% | $16.04 | 
+1.6% | $3.03 | 
| 2010 | $18.87 | +1.1% | $15.87 | 
+1.1% | $2.99 | 
| 2009 | $18.54 | +1.8% | $15.59 | 
+1.8% | $2.94 | 
| 2008 | $18.05 | +2.7% | $15.19 | 
+2.7% | $2.87 | 
| 2007 | $17.64 | +2.3% | $14.84 | 
+2.3% | $2.80 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $21.23 |   | $20.85 | 
  | $0.38 | 
| 2015 | $20.56 | +3.3% | $20.27 | 
+2.9% | $0.29 | 
| 2014 | $20.09 | +2.3% | $19.83 | 
+2.2% | $0.26 | 
| 2013 | $19.71 | +1.9% | $19.43 | 
+2.1% | $0.28 | 
| 2012 | $19.38 | +1.7% | $19.10 | 
+1.7% | $0.28 | 
| 2011 | $19.07 | +1.6% | $18.80 | 
+1.6% | $0.27 | 
| 2010 | $18.87 | +1.1% | $18.48 | 
+1.7% | $0.38 | 
| 2009 | $18.54 | +1.8% | $18.23 | 
+1.4% | $0.30 | 
| 2008 | $18.05 | +2.7% | $17.77 | 
+2.6% | $0.29 | 
| 2007 | $17.64 | +2.3% | $17.20 | 
+3.3% | $0.44 | 
  | 
| Reference Date: 1st Quarter 2016 |