| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,254 | $11,588 |
| 2016 | $18,575 | $12,280 |
| 2017 | $18,891 | $12,531 |
| 2018 | $18,891 | $13,968 |
| 2019 | $19,438 | $12,981 |
| 2020 | $18,935 | $12,478 |
| 2021* | $19,257 | $12,733 |
| 2022* | $19,584 | $12,992 |
| 2023* | $19,917 | $13,257 |
| 2024* | $20,256 | $13,528 |
| 2025* | $20,600 | $13,804 |