| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $12,946 | $9,252 |
| 2016 | $13,865 | $9,385 |
| 2017 | $12,696 | $6,394 |
| 2018 | $12,696 | $8,235 |
| 2019 | $13,088 | $7,975 |
| 2020 | $13,449 | $8,336 |
| 2021* | $13,820 | $8,456 |
| 2022* | $14,202 | $8,578 |
| 2023* | $14,594 | $8,701 |
| 2024* | $14,996 | $8,827 |
| 2025* | $15,410 | $8,954 |