For example: 1999-2001. You could also use "-1987" for everything published in and before 1987 or "2008-" for everything published in 2008 and after.
Eλληνικά (Greek, Modern [1453- ])
Latviešu valoda (Latvian)
lietuvių kalba (Lithuanian)
Saami (Sami languages)
Tiếng Việt (Vietnamese)