| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,537 | $13,044 |
| 2016 | $21,879 | $13,690 |
| 2017 | $22,710 | $14,293 |
| 2018 | $22,710 | $14,380 |
| 2019 | $24,021 | $15,327 |
| 2020 | $24,021 | $15,327 |
| 2021* | $24,403 | $16,001 |
| 2022* | $24,791 | $16,705 |
| 2023* | $25,185 | $17,440 |
| 2024* | $25,586 | $18,208 |
| 2025* | $25,992 | $19,009 |