Closed Access Embargo Metadata Only Access Open Access Restricted Unknown Total
Total 25 53 430 1275 962 49
2025 1 - 8 12 4 - 25
2024 - 33 31 195 117 - 376
2023 1 5 54 275 175 9 519
2022 2 6 51 219 175 4 457
2021 3 4 60 235 139 11 452
2020 9 5 111 201 185 8 519
2019 9 - 115 136 164 17 441
not yet published - - - 2 3 - 5