| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,607 | $19,626 |
| 2016 | $26,805 | $18,846 |
| 2017 | $28,068 | $20,717 |
| 2018 | $28,068 | $21,856 |
| 2019 | $31,180 | $22,852 |
| 2020 | $30,997 | $22,669 |
| 2021* | $32,448 | $23,703 |
| 2022* | $33,966 | $24,784 |
| 2023* | $35,556 | $25,914 |
| 2024* | $37,220 | $27,095 |
| 2025* | $38,962 | $28,331 |