| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,933 | $10,940 |
| 2016 | $18,301 | $10,812 |
| 2017 | $18,171 | $11,062 |
| 2018 | $18,171 | $11,342 |
| 2019 | $18,765 | $11,552 |
| 2020 | $19,039 | $11,826 |
| 2021* | $19,317 | $12,099 |
| 2022* | $19,599 | $12,379 |
| 2023* | $19,885 | $12,665 |
| 2024* | $20,175 | $12,957 |
| 2025* | $20,470 | $13,256 |
