| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,855 | $16,559 |
| 2016 | $25,762 | $17,683 |
| 2017 | $26,240 | $18,085 |
| 2018 | $26,240 | $17,979 |
| 2019 | $27,283 | $18,434 |
| 2020 | $27,755 | $18,906 |
| 2021* | $28,271 | $19,384 |
| 2022* | $28,797 | $19,875 |
| 2023* | $29,333 | $20,378 |
| 2024* | $29,878 | $20,893 |
| 2025* | $30,434 | $21,422 |
