| Year | Volume | Issue No. 1 | Issue No. 2 | Issue No. 3 | Issue No. 4 |
|---|---|---|---|---|---|
| 2024 | Vol. 46 | No. 1 (31.2M) | No. 2 (30.2M) | No. 3 (19.0M) | No. 4 (20.3M) |
| 2023 | Vol. 45 | No. 1 (4.8M) | No. 2 (15.7M) | No. 3 (20.4M) | No. 4 (25.1M) |
| 2022 | Vol. 44 | No. 1 (7.1M) | No. 2 (5.0M) | No. 3 (3.7M) | No. 4 (5.1M) |
| 2021 | Vol. 43 | No. 1 (16.0M) | No. 2 (5.5M) | No. 3 (7.8M) | No. 4 (2.2M) |
| 2020 | Vol. 42 | No. 1 (5.8M) | No. 2 (10.4M) | No. 3 (16.9M) | No. 4 (13.7M) |
| 2019 | Vol. 41 | No. 1 (16.4M) | No. 2 (7.7M) | No. 3 (3.9M) | No. 4 (3.5M) |
| 2018 | Vol. 40 | No. 1 (8.9M) | No. 2 (23.3M) | No. 3 (19.0M) | No. 4 (7.1M) |
| 2017 | Vol. 39 | No. 1 (12.3M) | No. 2 (6.5M) | No. 3 (6.4M) | No. 4 (7.2M) |
| 2016 | Vol. 38 | No. 1 (5.3M) | No. 2 (5.3M) | No. 3 (7.6M) | No. 4 (8.4M) |
| 2015 | Vol. 37 | No. 1 (3.7M) | No. 2 (8.0M) | No. 3 (5.1M) | No. 4 (3.7M) |
| 2014 | Vol. 36 | No. 1 (3.6M) | No. 2 (1.3M) | No. 3 (2.9M) | No. 4 (3.5M) |
| 2013 | Vol. 35 | No. 1 (5.0M) | No. 2 (1.5M) | No. 3 (1.1M) | No. 4 (1.3M) |
| 2012 | Vol. 34 | No. 1 (2.9M) | No. 2 (3.9M) | No. 3 (2.4M) | No. 4 (2.0M) |
| 2011 | Vol. 33 | No. 1 (2.5M) | No. 2 (10.4M) | No. 3 (1.8M) | No. 4 (1.7M) |
| 2010 | Vol. 32 | No. 1 (3.0M) | No. 2 (729.7K) | No. 3 (1.2M) | No. 4 (1.5M) |
| 2009 | Vol. 31 | No. 1 (1.4M) | No. 2 (1.3M) | No. 3 (2.8M) | No. 4 (2.6M) |
| 2008 | Vol. 30 | No. 1 (858.6K) | No. 2 (803.1K) | No. 3 (1.5M) | No. 4 (1.8M) |
| 2007 | Vol. 29 | No. 1 (3.0M) | No. 2 (1.0M) | No. 3 (1.1M) | No. 4 (1.6M) |
| 2006 | Vol. 28 | No. 1 (899.7K) | No. 2 (2.5M) | No. 3 (821.8K) | No. 4 (1.7M) |
| 2005 | Vol. 27 | No. 1 (291.6K) | No. 2 (418.7K) | No. 3 (855.8K) | No. 4 (1.7M) |
| 2004 | Vol. 26 | No. 1 (549.8K) | No. 2 (740.0K) | No. 3 (3.9M) | No. 4 (696.8K) |
| 2003 | Vol. 25 | No. 1 (442.8K) | No. 2 (2.1M) | No. 3 (221.8K) | No. 4 (1.0M) |
| 2002 | Vol. 24 | No. 1 (18.0M) | No. 2 (17.6M) | No. 3 (16.4M) | No. 4 (15.1M) |
| 2001 | Vol. 23 | No. 1 (17.6M) | No. 2 (20.3M) | No. 3 (15.2M) | No. 4 (18.0M) |
| 2000 | Vol. 22 | No. 1 (18.8M) | No. 2 (19.7M) | No. 3 (38.1M) | No. 4 (29.8M) |
| 1999 | Vol. 21 | No. 1 (40.0M) | No. 2 (41.1M) | No. 3 (40.1M) | No. 4 (41.6M) |
| 1998 | Vol. 20 | No. 1 (40.2M) | No. 2 (35.9M) | No. 4 (35.2M) | |
| 1997 | Vol. 19 | No. 1 (12.5M) | No. 2 (13.8M) | No. 3 (12.1M) | No. 4 (38.3M) |
| 1996 | Vol. 18 | No. 1 (11.1M) | No. 2 (12.3M) | No. 3 (11.6M) | No. 4 (11.9M) |
| 1995 | Vol. 17 | No. 1 (17.9M) | No. 2 (11.5M) | No. 3 (11.0M) | No. 4 (11.5M) |
| 1994 | Vol. 16 | No. 1 (13.0M) | No. 2 (11.1M) | No. 3 (11.4M) | No. 4 (11.5M) |
| 1992-93 | Vol. 15 | No. 1 (10.3M) | No. 2 (11.9M) | No. 3 (10.2M) | No. 4 (13.3M) |
| 1991-92 | Vol. 14 | No. 1 (5.6M) | No. 2 (6.6M) | No. 3 (6.0M) | No. 4 (6.1M) |
| 1990 | Vol. 13 | No. 1 (5.8M) | No. 2 (6.0M) | No. 3 (7.7M) | No. 4 (9.0M) |
| 1989 | Vol. 12 | No. 1 (5.8M) | No. 2 (8.3M) | No. 3 (5.9M) | No. 4 (6.2M) |
| 1988 | Vol. 11 | No. 1 (6.4M) | No. 2 (9.0M) | No. 3 (5.8M) | No. 4 (9.5M) |
| 1987 | Vol. 10 | No. 1 (7.3M) | No. 2 (9.0M) | No. 3 (8.6M) | No. 4 (7.9M) |
| 1986 | Vol. 9 | No. 1 (11.4M) | No. 2 (7.4M) | ||
| 1985 | Vol. 8 | No. 1 (7.6M) | |||
| 1984 | Vol. 7 | No. 1 (9.9M) | No. 2 (11.0M) | No. 3 (2.9M) | No. 4 (8.9M) |
| 1983 | Vol. 6 | No. 1 (8.2M) | No. 2 (16.9M) | No. 3 (16.9M) | |
| 1982 | Vol. 5 | No. 1 (9.9M) | No. 4 (8.3M) | ||
| 1981 | Vol. 4 | No. 1 (6.5M) | No. 2 (11.1M) | No. 3 (10.4M) | |
| 1980 | Vol. 3 | No. 1 (6.4M) | No. 2 (7.8M) | No. 3 (5.5M) | |
| 1979 | Vol. 2 | No. 1 (6.4M) | No. 2 (6.5M) | No. 3 (3.5M) | |
| 1978 | Vol. 1 | No. 1 (619.8K) |
