| Year/institution | Number of vacant positions (GL 15 - 17) | Total number of positions (GL 15 - 17) | Calculation of vacancy rates (no of vacant positions ÷ total no of positions × 100 | Vacancy rates (%) | |
| 2008 | Federal | 3 | 3 | 3 ÷ 3 × 100 | 100 |
| State | 2 | 3 | 2 ÷ 3 × 100 | 66.7 | |
| Local | 3 | 3 | - | 100 | |
| Private | - | - | - | - | |
| 2009 | Federal | 3 | 3 | 3 ÷ 3 × 100 | 100 |
| State | 3 | 3 | 3 ÷ 3 × 100 | 100 | |
| Local | 3 | 3 | 3 ÷ 3 × 100 | 100 | |
| Private | - | - | - | - | |
| 2010 | Federal | 3 | 3 | 3 ÷ 3 × 100 | 100 |
| State | 3 | 3 | 3 ÷ 3 × 100 | 100 | |
| Local | 3 | 3 | 3 ÷ 3 × 100 | 100 | |
| Private | - | - | - | - | |
| 2011 | Federal | 3 | 3 | 3 ÷ 3 × 100 | 100 |
| State | 3 | 3 | 3 ÷ 3 × 100 | 100 | |
| Local | 3 | 3 | 3 ÷ 3 × 100 | 100 | |
| Private | - | - | - | - | |
| 2012 | Federal | 3 | 3 | 3 ÷ 3 × 100 | 100 |
| State | 2 | 3 | 2 ÷ 3 × 100 | 66.7 | |
| Local | 3 | 3 | 3 ÷ 3 × 100 | 100 | |
| Private | - | - | - | - | |