| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,994 | $17,861 |
| 2016 | $27,632 | $17,897 |
| 2017 | $28,318 | $18,750 |
| 2018 | $28,318 | $18,272 |
| 2019 | $29,754 | $19,191 |
| 2020 | $30,030 | $19,467 |
| 2021* | $30,739 | $19,747 |
| 2022* | $31,464 | $20,032 |
| 2023* | $32,207 | $20,320 |
| 2024* | $32,967 | $20,613 |
| 2025* | $33,745 | $20,910 |
