| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,101 | $13,519 |
| 2016 | $20,765 | $13,948 |
| 2017 | $21,345 | $14,717 |
| 2018 | $21,345 | $14,462 |
| 2019 | $22,930 | $15,799 |
| 2020 | $21,083 | $13,952 |
| 2021* | $21,671 | $14,394 |
| 2022* | $22,276 | $14,851 |
| 2023* | $22,897 | $15,321 |
| 2024* | $23,536 | $15,807 |
| 2025* | $24,193 | $16,308 |