  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $18.44 |   | $27.20 | 
  | -$8.76 | 
| 2015 | $17.95 | +2.7% | $26.48 | 
+2.7% | -$8.52 | 
| 2014 | $17.59 | +2.0% | $25.95 | 
+2.0% | -$8.35 | 
| 2013 | $17.37 | +1.3% | $25.62 | 
+1.3% | -$8.25 | 
| 2012 | $17.12 | +1.5% | $25.25 | 
+1.5% | -$8.13 | 
| 2011 | $16.88 | +1.4% | $24.90 | 
+1.4% | -$8.01 | 
| 2010 | $16.70 | +1.1% | $24.63 | 
+1.1% | -$7.93 | 
| 2009 | $16.37 | +2.0% | $24.15 | 
+2.0% | -$7.77 | 
| 2008 | $15.93 | +2.8% | $23.49 | 
+2.8% | -$7.56 | 
| 2007 | $15.30 | +4.1% | $22.57 | 
+4.1% | -$7.26 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $18.44 |   | $20.85 | 
  | -$2.41 | 
| 2015 | $17.95 | +2.7% | $20.27 | 
+2.9% | -$2.31 | 
| 2014 | $17.59 | +2.0% | $19.83 | 
+2.2% | -$2.24 | 
| 2013 | $17.37 | +1.3% | $19.43 | 
+2.1% | -$2.06 | 
| 2012 | $17.12 | +1.5% | $19.10 | 
+1.7% | -$1.98 | 
| 2011 | $16.88 | +1.4% | $18.80 | 
+1.6% | -$1.92 | 
| 2010 | $16.70 | +1.1% | $18.48 | 
+1.7% | -$1.78 | 
| 2009 | $16.37 | +2.0% | $18.23 | 
+1.4% | -$1.86 | 
| 2008 | $15.93 | +2.8% | $17.77 | 
+2.6% | -$1.83 | 
| 2007 | $15.30 | +4.1% | $17.20 | 
+3.3% | -$1.89 | 
  | 
| Reference Date: 1st Quarter 2016 |