分面浏览：发表日期 |
| 当前检索式 | ((ALL：保护动机)) |
| 限定条件 | 无 |
| 2023 2 | 2022 2 | 2021 12 |
| 2020 12 | 2019 26 | 2018 30 |
| 2017 42 | 2016 55 | 2015 30 |
| 2014 38 | 2013 27 | 2012 53 |
| 2011 41 | 2010 65 | 2009 35 |
| 2008 39 | 2007 24 | 2006 23 |
| 2005 11 | 2004 16 | 2003 18 |
| 2002 8 | 2001 7 | 2000 13 |
| 1999 8 | 1998 5 | 1997 5 |
| 1996 4 | 1995 4 | 1994 1 |
| 1993 2 | 1992 2 | 1991 2 |
| 1990 1 | 1987 1 |
