Closed Access Embargo Metadata Only Access Open Access Restricted Unknown Total
Total 26 50 424 1286 978 46
2025 1 - 13 15 5 - 34
2024 - 31 22 201 127 - 381
2023 2 4 54 277 175 9 521
2022 2 6 51 220 175 4 458
2021 3 4 60 235 140 10 452
2020 9 5 110 200 185 9 518
2019 9 - 114 136 168 14 441
not yet published - - - 2 3 - 5