| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $55,536 | $36,719 |
| 2016 | $56,014 | $35,819 |
| 2017 | $57,214 | $35,539 |
| 2018 | $57,214 | $33,634 |
| 2019 | $62,868 | $33,665 |
| 2020 | $64,892 | $35,689 |
| 2021* | $66,281 | $35,411 |
| 2022* | $67,699 | $35,134 |
| 2023* | $69,148 | $34,860 |
| 2024* | $70,628 | $34,588 |
| 2025* | $72,139 | $34,319 |