  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $20.47 |   | $20.05 | 
  | $0.42 | 
| 2015 | $19.73 | +3.8% | $19.32 | 
+3.8% | $0.40 | 
| 2014 | $19.34 | +2.0% | $18.95 | 
+2.0% | $0.40 | 
| 2013 | $18.96 | +2.0% | $18.57 | 
+2.0% | $0.39 | 
| 2012 | $18.63 | +1.7% | $18.25 | 
+1.7% | $0.38 | 
| 2011 | $18.30 | +1.8% | $17.92 | 
+1.8% | $0.38 | 
| 2010 | $18.01 | +1.6% | $17.64 | 
+1.6% | $0.37 | 
| 2009 | $17.67 | +1.9% | $17.31 | 
+1.9% | $0.36 | 
| 2008 | $17.18 | +2.8% | $16.83 | 
+2.8% | $0.35 | 
| 2007 | $16.64 | +3.3% | $16.30 | 
+3.3% | $0.34 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $20.47 |   | $23.35 | 
  | -$2.88 | 
| 2015 | $19.73 | +3.8% | $22.70 | 
+2.9% | -$2.96 | 
| 2014 | $19.34 | +2.0% | $22.21 | 
+2.2% | -$2.86 | 
| 2013 | $18.96 | +2.0% | $21.76 | 
+2.1% | -$2.80 | 
| 2012 | $18.63 | +1.7% | $21.39 | 
+1.7% | -$2.75 | 
| 2011 | $18.30 | +1.8% | $21.05 | 
+1.6% | -$2.75 | 
| 2010 | $18.01 | +1.6% | $20.70 | 
+1.7% | -$2.69 | 
| 2009 | $17.67 | +1.9% | $20.42 | 
+1.4% | -$2.75 | 
| 2008 | $17.18 | +2.8% | $19.90 | 
+2.6% | -$2.71 | 
| 2007 | $16.64 | +3.3% | $19.26 | 
+3.3% | -$2.62 | 
  | 
| Reference Date: 1st Quarter 2016 |