| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $64,400 | $19,545 |
| 2016 | $66,900 | $20,392 |
| 2017 | $69,600 | $21,405 |
| 2018 | $69,600 | $19,730 |
| 2019 | $73,800 | $18,345 |
| 2020 | $75,857 | $20,402 |
| 2021* | $78,800 | $21,285 |
| 2022* | $81,858 | $22,207 |
| 2023* | $85,034 | $23,169 |
| 2024* | $88,333 | $24,172 |
| 2025* | $91,760 | $25,218 |