| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,630 | $11,405 |
| 2016 | $21,626 | $14,677 |
| 2017 | $20,902 | $13,816 |
| 2018 | $20,902 | $13,395 |
| 2019 | $22,316 | $9,207 |
| 2020 | $22,670 | $9,561 |
| 2021* | $23,030 | $9,269 |
| 2022* | $23,397 | $8,987 |
| 2023* | $23,769 | $8,713 |
| 2024* | $24,147 | $8,447 |
| 2025* | $24,530 | $8,189 |
