  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $23.54 |   | $17.86 | 
  | $5.68 | 
| 2015 | $22.79 | +3.3% | $17.29 | 
+3.3% | $5.50 | 
| 2014 | $22.28 | +2.3% | $16.90 | 
+2.3% | $5.38 | 
| 2013 | $21.86 | +1.9% | $16.58 | 
+1.9% | $5.27 | 
| 2012 | $21.49 | +1.7% | $16.31 | 
+1.7% | $5.19 | 
| 2011 | $21.15 | +1.6% | $16.04 | 
+1.6% | $5.10 | 
| 2010 | $20.92 | +1.1% | $15.87 | 
+1.1% | $5.05 | 
| 2009 | $20.55 | +1.8% | $15.59 | 
+1.8% | $4.96 | 
| 2008 | $20.02 | +2.7% | $15.19 | 
+2.7% | $4.83 | 
| 2007 | $19.56 | +2.3% | $14.84 | 
+2.3% | $4.72 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $23.54 |   | $20.85 | 
  | $2.69 | 
| 2015 | $22.79 | +3.3% | $20.27 | 
+2.9% | $2.53 | 
| 2014 | $22.28 | +2.3% | $19.83 | 
+2.2% | $2.44 | 
| 2013 | $21.86 | +1.9% | $19.43 | 
+2.1% | $2.42 | 
| 2012 | $21.49 | +1.7% | $19.10 | 
+1.7% | $2.39 | 
| 2011 | $21.15 | +1.6% | $18.80 | 
+1.6% | $2.35 | 
| 2010 | $20.92 | +1.1% | $18.48 | 
+1.7% | $2.43 | 
| 2009 | $20.55 | +1.8% | $18.23 | 
+1.4% | $2.32 | 
| 2008 | $20.02 | +2.7% | $17.77 | 
+2.6% | $2.25 | 
| 2007 | $19.56 | +2.3% | $17.20 | 
+3.3% | $2.36 | 
  | 
| Reference Date: 1st Quarter 2016 |