分面浏览：发表日期 |
| 当前检索式 | ((ALL：observations)) |
| 限定条件 | 无 |
| 2024 90 | 2023 246 | 2022 464 |
| 2021 730 | 2020 859 | 2019 1733 |
| 2018 1965 | 2017 1901 | 2016 1868 |
| 2015 1631 | 2014 1607 | 2013 1302 |
| 2012 1196 | 2011 980 | 2010 1450 |
| 2009 895 | 2008 778 | 2007 641 |
| 2006 624 | 2005 582 | 2004 430 |
| 2003 352 | 2002 294 | 2001 298 |
| 2000 198 | 1999 162 | 1998 148 |
| 1997 119 | 1996 81 | 1995 59 |
| 1994 54 | 1993 58 | 1992 50 |
| 1991 58 | 1990 25 | 1989 16 |
| 1988 10 | 1987 18 | 1986 9 |
| 1985 7 | 1984 14 | 1983 11 |
| 1982 3 | 1981 9 | 1980 2 |
| 1979 1 | 1978 1 | 1977 3 |
| 1973 1 | 1971 1 | 1955 1 |
| 1949 1 | 1905 1 |
