| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $16,517 | $9,097 |
| 2016 | $16,875 | $9,983 |
| 2017 | $18,428 | $10,955 |
| 2018 | $18,428 | $10,931 |
| 2019 | $17,699 | $10,563 |
| 2020 | $18,427 | $11,291 |
| 2021* | $18,827 | $12,069 |
| 2022* | $19,235 | $12,901 |
| 2023* | $19,653 | $13,789 |
| 2024* | $20,079 | $14,739 |
| 2025* | $20,515 | $15,755 |