Portico
2000-2008
Preserved
2026-04-30
Preserved : 2000: 80(1-3, 5-6, 11), 2001: 81(1, 5-12), 2002: 82(1-12), 2003: 83(1-12), 2004: 84(1-12), 2005: 85(1-2, 10), 2006: 86(1, 4-12), 2007: 87(1-12), 2008: 88(1)
Portico
2009-2026
Preserved
2026-04-30
Preserved : 2009: 89(3-12), 2010: 90(1-12), 2011: 91(1-12), 2012: 92(1-12), 2013: 93(1-2, 8), 2014: 94(2-3, 5-6), 2015: 95(1-12), 2016: 96(1-12), 2017: 97(1-6), 2018: 98(1-12), 2019: 99(1-12), 2020: 100(1-12), 2021: 101(1-12), 2022: 102(1-5, 7-12), 2023: 103(1-3, 3, S, 4-12), 2024: 104(1-3, 3, S, 4-12), 2025: 105(1-3, 3, S, 4-12), 2026: 106(1-4)
Internet Archive
1969-1970
Preserved
2025-08-08
20 to 23
CLOCKSS Archive
2006-2026
Preserved
2026-05-04
88 to 106
CLOCKSS Archive
2008-2016
Preserved
2026-05-04
88 to 96
LOCKSS Archive
2000-2020
In Progress
2026-05-04
80 to 100
CLOCKSS Archive
2018-2022
Preserved
2026-05-04
98 to 102
Portico
2000-2022
Preserved
2026-04-30
Preserved : 2000: 80(1-11), 2001: 81(1-6, 8, 10-12), 2002: 82(1-12), 2003: 83(1-12), 2004: 84(1-12), 2005: 85(1-12), 2006: 86(1, 1, S, 2-12), 2007: 87(1, 1, S, 2-12), 2008: 88(1, 1, S, 2-7, 9-12), 2009: 89(1, 1, S, 2, 4-12), 2010: 90(1, 1, S, 2-12), 2011: 91(1-12), 2012: 92(1, S 1, 2-11), 2013: 93(1-2, 6-12), 2014: 94(1, S 1, 2-12), 2015: 95(1, S 1, 2-12), 2016: 96(1, S 1, 2-12), 2013/2017: 97(1, S 1, 2-12), 2018: 98(1-12), 2019: 99(1, S 1, 2-12), 2020: 100(1, S 1, 2-12), 2021: 101(1, S 1, 2-12), 2022: 102(1, S 1, 2-12)
Library of Congress
2018-2022
Preserved
2025-04-07
97 (11); 98 (3 to 12); 99 (1, S1, 2 to 9, 11, 12); 100 (1, S1, 2 to 12); 101 (1, S1, 2 to 12); 102 (1 to 3, 9)
National Digital Preservation Program, China
2018-2022
Preserved
2025-10-23
Preserved : 1 (Suppl 1, 1, 4 to 9, 11, 12); 11 (Suppl 1, 1 to 9, 11, 12); 12 (Suppl 1, 1 to 9, 11, 12); 98 (4); 99 (Suppl 1)
National Digital Preservation Program, China
2018-2022
Preserved
2025-12-04
Preserved : 1 (Suppl 1, 1, 4 to 9, 11, 12); 11 (Suppl 1, 1 to 9, 11, 12); 12 (Suppl 1, 1 to 9, 11, 12); 98 (4); 99 (Suppl 1)