  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $21.99 |   | $17.86 | 
  | $4.13 | 
| 2015 | $21.29 | +3.3% | $17.29 | 
+3.3% | $4.00 | 
| 2014 | $20.81 | +2.3% | $16.90 | 
+2.3% | $3.91 | 
| 2013 | $20.42 | +1.9% | $16.58 | 
+1.9% | $3.83 | 
| 2012 | $20.08 | +1.7% | $16.31 | 
+1.7% | $3.77 | 
| 2011 | $19.76 | +1.6% | $16.04 | 
+1.6% | $3.71 | 
| 2010 | $19.54 | +1.1% | $15.87 | 
+1.1% | $3.67 | 
| 2009 | $19.20 | +1.8% | $15.59 | 
+1.8% | $3.61 | 
| 2008 | $18.70 | +2.7% | $15.19 | 
+2.7% | $3.51 | 
| 2007 | $18.27 | +2.3% | $14.84 | 
+2.3% | $3.43 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $21.99 |   | $20.85 | 
  | $1.14 | 
| 2015 | $21.29 | +3.3% | $20.27 | 
+2.9% | $1.03 | 
| 2014 | $20.81 | +2.3% | $19.83 | 
+2.2% | $0.98 | 
| 2013 | $20.42 | +1.9% | $19.43 | 
+2.1% | $0.98 | 
| 2012 | $20.08 | +1.7% | $19.10 | 
+1.7% | $0.98 | 
| 2011 | $19.76 | +1.6% | $18.80 | 
+1.6% | $0.96 | 
| 2010 | $19.54 | +1.1% | $18.48 | 
+1.7% | $1.06 | 
| 2009 | $19.20 | +1.8% | $18.23 | 
+1.4% | $0.97 | 
| 2008 | $18.70 | +2.7% | $17.77 | 
+2.6% | $0.93 | 
| 2007 | $18.27 | +2.3% | $17.20 | 
+3.3% | $1.07 | 
  | 
| Reference Date: 1st Quarter 2016 |