| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,236 | $16,080 |
| 2016 | $22,404 | $15,384 |
| 2017 | $23,305 | $16,573 |
| 2018 | $23,305 | $16,805 |
| 2019 | $25,005 | $18,668 |
| 2020 | $25,805 | $19,468 |
| 2021* | $26,631 | $20,303 |
| 2022* | $27,483 | $21,174 |
| 2023* | $28,362 | $22,083 |
| 2024* | $29,270 | $23,030 |
| 2025* | $30,207 | $24,018 |