| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $32,582 | $21,077 |
| 2016 | $33,346 | $21,346 |
| 2017 | $36,078 | $23,335 |
| 2018 | $36,078 | $22,202 |
| 2019 | $35,898 | $22,151 |
| 2020 | $36,481 | $22,734 |
| 2021* | $37,072 | $23,025 |
| 2022* | $37,673 | $23,320 |
| 2023* | $38,283 | $23,618 |
| 2024* | $38,903 | $23,921 |
| 2025* | $39,533 | $24,227 |