  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $18.96 |   | $12.61 | 
  | $6.35 | 
| 2015 | $18.46 | +2.7% | $12.27 | 
+2.7% | $6.18 | 
| 2014 | $18.09 | +2.0% | $12.03 | 
+2.0% | $6.06 | 
| 2013 | $17.86 | +1.3% | $11.88 | 
+1.3% | $5.98 | 
| 2012 | $17.60 | +1.5% | $11.70 | 
+1.5% | $5.89 | 
| 2011 | $17.35 | +1.4% | $11.54 | 
+1.4% | $5.81 | 
| 2010 | $17.17 | +1.1% | $11.42 | 
+1.1% | $5.75 | 
| 2009 | $16.83 | +2.0% | $11.20 | 
+2.0% | $5.64 | 
| 2008 | $16.38 | +2.8% | $10.89 | 
+2.8% | $5.48 | 
| 2007 | $15.73 | +4.1% | $10.46 | 
+4.1% | $5.27 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $18.96 |   | $20.85 | 
  | -$1.89 | 
| 2015 | $18.46 | +2.7% | $20.27 | 
+2.9% | -$1.81 | 
| 2014 | $18.09 | +2.0% | $19.83 | 
+2.2% | -$1.74 | 
| 2013 | $17.86 | +1.3% | $19.43 | 
+2.1% | -$1.57 | 
| 2012 | $17.60 | +1.5% | $19.10 | 
+1.7% | -$1.50 | 
| 2011 | $17.35 | +1.4% | $18.80 | 
+1.6% | -$1.44 | 
| 2010 | $17.17 | +1.1% | $18.48 | 
+1.7% | -$1.31 | 
| 2009 | $16.83 | +2.0% | $18.23 | 
+1.4% | -$1.39 | 
| 2008 | $16.38 | +2.8% | $17.77 | 
+2.6% | -$1.39 | 
| 2007 | $15.73 | +4.1% | $17.20 | 
+3.3% | -$1.46 | 
  | 
| Reference Date: 1st Quarter 2016 |