| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,715 | $13,846 |
| 2016 | $25,230 | $14,252 |
| 2017 | $26,130 | $15,050 |
| 2018 | $26,130 | $15,176 |
| 2019 | $26,930 | $15,581 |
| 2020 | $29,086 | $17,737 |
| 2021* | $29,976 | $18,257 |
| 2022* | $30,893 | $18,792 |
| 2023* | $31,839 | $19,342 |
| 2024* | $32,813 | $19,909 |
| 2025* | $33,817 | $20,492 |