| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $34,492 | $18,630 |
| 2016 | $35,421 | $20,470 |
| 2017 | $36,443 | $21,264 |
| 2018 | $36,443 | $19,973 |
| 2019 | $38,485 | $21,646 |
| 2020 | $39,432 | $22,593 |
| 2021* | $40,493 | $23,580 |
| 2022* | $41,582 | $24,611 |
| 2023* | $42,701 | $25,686 |
| 2024* | $43,849 | $26,809 |
| 2025* | $45,029 | $27,980 |