| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,751 | $12,677 |
| 2016 | $19,942 | $13,579 |
| 2017 | $20,205 | $13,615 |
| 2018 | $20,205 | $13,588 |
| 2019 | $21,820 | $14,416 |
| 2020 | $22,300 | $14,896 |
| 2021* | $22,791 | $15,392 |
| 2022* | $23,292 | $15,905 |
| 2023* | $23,804 | $16,434 |
| 2024* | $24,328 | $16,981 |
| 2025* | $24,863 | $17,547 |
