1990 |
8 songs
|
|
1991 |
7.5 songs
|
|
1992 |
10.7 songs
|
|
1993 |
16.1 songs
|
|
1994 |
18.8 songs
|
|
1995 |
23.8 songs
|
|
1996 |
23.1 songs
|
|
1997 |
12.8 songs
|
|
1998 |
21.9 songs
|
|
1999 |
7 songs
|
|
2000 |
25.5 songs
|
|
2001 |
10.3 songs
|
|
2002 |
14.6 songs
|
|
2003 |
26.4 songs
|
|
2004 |
15.7 songs
|
|
2005 |
25.6 songs
|
|
2006 |
25.1 songs
|
|
2007 |
22.3 songs
|
|
2008 |
26.6 songs
|
|
2009 |
27.3 songs
|
|
2010 |
23.3 songs
|
|
2011 |
27.4 songs
|
|
2012 |
27.4 songs
|
|
2013 |
30.9 songs
|
|
2014 |
29 songs
|
|
2015 |
26.7 songs
|
|
2016 |
31.1 songs
|
|
2017 |
25.6 songs
|
|
2018 |
26.6 songs
|
|
2019 |
24 songs
|