| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2011 | N/A | N/A |
| 2012 | $23,208 | $14,900 |
| 2013 | $23,948 | $15,640 |
| 2014 | $25,180 | $16,683 |
| 2015 | $25,180 | $16,683 |
| 2016 | $24,940 | $16,218 |
| 2017* | $25,337 | $16,620 |
| 2018* | $25,739 | $17,032 |
| 2019* | $26,149 | $17,455 |
| 2020* | $26,564 | $17,888 |
| 2021* | $26,987 | $18,331 |
