| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,984 | $10,520 |
| 2016 | $19,982 | $11,141 |
| 2017 | $21,784 | $12,781 |
| 2018 | $21,784 | $13,453 |
| 2019 | $22,888 | $14,338 |
| 2020 | $22,574 | $14,024 |
| 2021* | $23,719 | $14,851 |
| 2022* | $24,921 | $15,728 |
| 2023* | $26,185 | $16,656 |
| 2024* | $27,512 | $17,638 |
| 2025* | $28,907 | $18,679 |