  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $23.78 |   | $20.47 | 
  | $3.31 | 
| 2015 | $23.18 | +2.6% | $19.95 | 
+2.6% | $3.23 | 
| 2014 | $22.74 | +1.9% | $19.58 | 
+1.9% | $3.17 | 
| 2013 | $22.31 | +1.9% | $19.20 | 
+1.9% | $3.11 | 
| 2012 | $21.87 | +2.0% | $18.83 | 
+2.0% | $3.04 | 
| 2011 | $21.53 | +1.6% | $18.54 | 
+1.6% | $3.00 | 
| 2010 | $21.16 | +1.8% | $18.21 | 
+1.8% | $2.94 | 
| 2009 | $20.93 | +1.1% | $18.02 | 
+1.1% | $2.91 | 
| 2008 | $20.31 | +3.1% | $17.48 | 
+3.1% | $2.83 | 
| 2007 | $19.63 | +3.5% | $16.90 | 
+3.5% | $2.73 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $23.78 |   | $19.32 | 
  | $4.46 | 
| 2015 | $23.18 | +2.6% | $18.78 | 
+2.9% | $4.40 | 
| 2014 | $22.74 | +1.9% | $18.38 | 
+2.2% | $4.36 | 
| 2013 | $22.31 | +1.9% | $18.01 | 
+2.1% | $4.30 | 
| 2012 | $21.87 | +2.0% | $17.70 | 
+1.7% | $4.18 | 
| 2011 | $21.53 | +1.6% | $17.42 | 
+1.6% | $4.11 | 
| 2010 | $21.16 | +1.8% | $17.13 | 
+1.7% | $4.03 | 
| 2009 | $20.93 | +1.1% | $16.90 | 
+1.4% | $4.03 | 
| 2008 | $20.31 | +3.1% | $16.46 | 
+2.6% | $3.84 | 
| 2007 | $19.63 | +3.5% | $15.94 | 
+3.3% | $3.69 | 
  | 
| Reference Date: 1st Quarter 2016 |