| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,648 | $14,216 |
| 2016 | $25,232 | $16,933 |
| 2017 | $26,719 | $17,902 |
| 2018 | $26,719 | $18,249 |
| 2019 | $26,987 | $17,554 |
| 2020 | $27,145 | $17,712 |
| 2021* | $27,416 | $18,056 |
| 2022* | $27,691 | $18,406 |
| 2023* | $27,968 | $18,763 |
| 2024* | $28,247 | $19,127 |
| 2025* | $28,530 | $19,498 |
