| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,911 | $13,366 |
| 2016 | $19,129 | $12,971 |
| 2017 | $20,984 | $13,931 |
| 2018 | $20,984 | $11,142 |
| 2019 | $24,968 | $13,612 |
| 2020 | $26,076 | $14,720 |
| 2021* | $27,234 | $15,809 |
| 2022* | $28,443 | $16,979 |
| 2023* | $29,706 | $18,236 |
| 2024* | $31,025 | $19,585 |
| 2025* | $32,402 | $21,034 |