| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,448 | $14,172 |
| 2016 | $19,448 | $13,881 |
| 2017 | $19,808 | $14,046 |
| 2018 | $19,808 | $14,253 |
| 2019 | $20,968 | $14,124 |
| 2020 | $21,378 | $14,534 |
| 2021* | $21,773 | $14,707 |
| 2022* | $22,176 | $14,882 |
| 2023* | $22,587 | $15,059 |
| 2024* | $23,004 | $15,238 |
| 2025* | $23,430 | $15,420 |
