| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,801 | $14,769 |
| 2016 | $21,821 | $14,677 |
| 2017 | $22,546 | $15,103 |
| 2018 | $22,546 | $15,076 |
| 2019 | $23,132 | $15,069 |
| 2020 | $23,756 | $15,693 |
| 2021* | $24,374 | $15,685 |
| 2022* | $25,007 | $15,677 |
| 2023* | $25,658 | $15,669 |
| 2024* | $26,325 | $15,662 |
| 2025* | $27,009 | $15,654 |
