| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,304 | $19,314 |
| 2016 | $24,982 | $18,215 |
| 2017 | $25,954 | $19,828 |
| 2018 | $25,954 | $17,710 |
| 2019 | $28,946 | $19,420 |
| 2020 | $29,573 | $20,047 |
| 2021* | $30,215 | $20,695 |
| 2022* | $30,870 | $21,363 |
| 2023* | $31,540 | $22,053 |
| 2024* | $32,225 | $22,765 |
| 2025* | $32,924 | $23,501 |