| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,027 | $15,023 |
| 2016 | $23,488 | $15,606 |
| 2017 | $24,224 | $15,961 |
| 2018 | $24,224 | $16,310 |
| 2019 | $27,712 | $19,566 |
| 2020 | $28,235 | $20,089 |
| 2021* | $28,800 | $20,625 |
| 2022* | $29,376 | $21,176 |
| 2023* | $29,963 | $21,741 |
| 2024* | $30,562 | $22,322 |
| 2025* | $31,174 | $22,918 |