| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,990 | $15,443 |
| 2016 | $20,410 | $16,656 |
| 2017 | $20,780 | $19,083 |
| 2018 | $20,780 | $17,612 |
| 2019 | $22,460 | $19,295 |
| 2020 | $21,692 | $18,527 |
| 2021* | $22,085 | $19,981 |
| 2022* | $22,484 | $21,550 |
| 2023* | $22,891 | $23,242 |
| 2024* | $23,306 | $25,066 |
| 2025* | $23,727 | $27,034 |
