  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $19.84 |   | $17.86 | 
  | $1.98 | 
| 2015 | $19.21 | +3.3% | $17.29 | 
+3.3% | $1.92 | 
| 2014 | $18.78 | +2.3% | $16.90 | 
+2.3% | $1.87 | 
| 2013 | $18.42 | +1.9% | $16.58 | 
+1.9% | $1.84 | 
| 2012 | $18.11 | +1.7% | $16.31 | 
+1.7% | $1.81 | 
| 2011 | $17.82 | +1.6% | $16.04 | 
+1.6% | $1.78 | 
| 2010 | $17.63 | +1.1% | $15.87 | 
+1.1% | $1.76 | 
| 2009 | $17.32 | +1.8% | $15.59 | 
+1.8% | $1.73 | 
| 2008 | $16.87 | +2.7% | $15.19 | 
+2.7% | $1.68 | 
| 2007 | $16.48 | +2.3% | $14.84 | 
+2.3% | $1.65 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $19.84 |   | $20.85 | 
  | -$1.01 | 
| 2015 | $19.21 | +3.3% | $20.27 | 
+2.9% | -$1.05 | 
| 2014 | $18.78 | +2.3% | $19.83 | 
+2.2% | -$1.05 | 
| 2013 | $18.42 | +1.9% | $19.43 | 
+2.1% | -$1.01 | 
| 2012 | $18.11 | +1.7% | $19.10 | 
+1.7% | -$0.98 | 
| 2011 | $17.82 | +1.6% | $18.80 | 
+1.6% | -$0.97 | 
| 2010 | $17.63 | +1.1% | $18.48 | 
+1.7% | -$0.85 | 
| 2009 | $17.32 | +1.8% | $18.23 | 
+1.4% | -$0.90 | 
| 2008 | $16.87 | +2.7% | $17.77 | 
+2.6% | -$0.89 | 
| 2007 | $16.48 | +2.3% | $17.20 | 
+3.3% | -$0.71 | 
  | 
| Reference Date: 1st Quarter 2016 |