| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,015 | $12,235 |
| 2016 | $23,225 | $13,716 |
| 2017 | $22,391 | $12,821 |
| 2018 | $22,391 | $13,028 |
| 2019 | $24,533 | $14,335 |
| 2020 | $26,210 | $16,012 |
| 2021* | $26,449 | $17,618 |
| 2022* | $26,689 | $19,385 |
| 2023* | $26,932 | $21,329 |
| 2024* | $27,177 | $23,469 |
| 2025* | $27,424 | $25,823 |
