| Time Period | Minimum | 25th Percentile | Median | Average | 75th Percentile | Maximum | Standard Deviation |
|---|---|---|---|---|---|---|---|
| 2004-2008 | 0.72 | 1.00 | 1.08 | 1.09 | 1.18 | 1.64 | 0.14 |
| 2009-2013 | 0.72 | 0.95 | 1.03 | 1.04 | 1.11 | 1.51 | 0.11 |
| 2014-2018 | 0.72 | 0.89 | 0.94 | 0.95 | 1.00 | 1.32 | 0.09 |
| Total | 0.72 | 0.93 | 1.01 | 1.03 | 1.10 | 1.64 | 0.13 |