| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,685 | $14,702 |
| 2016 | $29,684 | $14,473 |
| 2017 | $30,461 | $13,596 |
| 2018 | $30,461 | $11,710 |
| 2019 | $32,038 | $12,310 |
| 2020 | $32,484 | $12,756 |
| 2021* | $33,335 | $12,557 |
| 2022* | $34,208 | $12,361 |
| 2023* | $35,105 | $12,168 |
| 2024* | $36,024 | $11,978 |
| 2025* | $36,968 | $11,792 |