分面浏览：发表日期 |
| 当前检索式 | ((ALL：Density variation)) |
| 限定条件 | 无 |
| 2024 6 | 2023 16 | 2022 57 |
| 2021 72 | 2020 129 | 2019 172 |
| 2018 178 | 2017 142 | 2016 185 |
| 2015 200 | 2014 178 | 2013 131 |
| 2012 138 | 2011 125 | 2010 187 |
| 2009 96 | 2008 76 | 2007 76 |
| 2006 76 | 2005 75 | 2004 61 |
| 2003 44 | 2002 27 | 2001 27 |
| 2000 19 | 1999 27 | 1998 21 |
| 1997 6 | 1996 5 | 1995 7 |
| 1994 9 | 1993 1 | 1992 6 |
| 1991 6 | 1990 3 | 1989 3 |
| 1988 2 | 1986 1 | 1985 2 |
| 1984 1 | 1983 1 |
