Scientific Report
2013
5,675
2016
5,642
2014
5,627
2015
5,609
2022
5,503
2021
5,361
2012
5,250
2019
5,244
2011
5,005
2018
4,993
2017
4,968
2023
4,933
2006
4,891
2010
4,881
2009
4,804
2001
4,782
2005
4,707
2004
4,705
2002
4,635
2000
4,542
2008
4,502
2007
4,467
2003
4,254
2020
3,739
1999
2,952
2024
933
1997
276
1998
133
1996
42
1991
15
1990
14
1994
13
1992
11
1995
11
1987
8
1993
8
1986
4
N/A
4
1966
3
1969
3
1989
3
None
3
1962
2
1970
2
1982
2
1984
2
1961
1
1964
1
1968
1
1972
1
more ...