| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,846 | $14,908 |
| 2016 | $20,208 | $15,247 |
| 2017 | $20,730 | $15,679 |
| 2018 | $20,730 | $15,688 |
| 2019 | $21,490 | $16,113 |
| 2020 | $21,886 | $16,509 |
| 2021* | $22,289 | $16,915 |
| 2022* | $22,699 | $17,331 |
| 2023* | $23,116 | $17,758 |
| 2024* | $23,542 | $18,194 |
| 2025* | $23,975 | $18,642 |
