| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,228 | $13,702 |
| 2016 | $19,348 | $14,080 |
| 2017 | $21,989 | $16,659 |
| 2018 | $21,989 | $16,795 |
| 2019 | $22,453 | $16,984 |
| 2020 | $23,553 | $18,084 |
| 2021* | $24,050 | $18,583 |
| 2022* | $24,557 | $19,096 |
| 2023* | $25,076 | $19,623 |
| 2024* | $25,605 | $20,165 |
| 2025* | $26,145 | $20,721 |
