  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $9.39 |   | $38.55 | 
  | -$29.16 | 
| 2015 | $9.15 | +2.6% | $37.57 | 
+2.6% | -$28.41 | 
| 2014 | $8.98 | +1.9% | $36.87 | 
+1.9% | -$27.88 | 
| 2013 | $8.81 | +1.9% | $36.16 | 
+1.9% | -$27.35 | 
| 2012 | $8.64 | +2.0% | $35.46 | 
+2.0% | -$26.82 | 
| 2011 | $8.50 | +1.6% | $34.91 | 
+1.6% | -$26.40 | 
| 2010 | $8.35 | +1.8% | $34.30 | 
+1.8% | -$25.94 | 
| 2009 | $8.26 | +1.1% | $33.93 | 
+1.1% | -$25.66 | 
| 2008 | $8.02 | +3.1% | $32.92 | 
+3.1% | -$24.90 | 
| 2007 | $7.75 | +3.5% | $31.82 | 
+3.5% | -$24.06 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $9.39 |   | $21.85 | 
  | -$12.46 | 
| 2015 | $9.15 | +2.6% | $21.24 | 
+2.9% | -$12.08 | 
| 2014 | $8.98 | +1.9% | $20.78 | 
+2.2% | -$11.80 | 
| 2013 | $8.81 | +1.9% | $20.37 | 
+2.1% | -$11.55 | 
| 2012 | $8.64 | +2.0% | $20.02 | 
+1.7% | -$11.37 | 
| 2011 | $8.50 | +1.6% | $19.70 | 
+1.6% | -$11.19 | 
| 2010 | $8.35 | +1.8% | $19.37 | 
+1.7% | -$11.01 | 
| 2009 | $8.26 | +1.1% | $19.11 | 
+1.4% | -$10.84 | 
| 2008 | $8.02 | +3.1% | $18.62 | 
+2.6% | -$10.60 | 
| 2007 | $7.75 | +3.5% | $18.02 | 
+3.3% | -$10.27 | 
  | 
| Reference Date: 1st Quarter 2016 |