Scientific Report
2013
5,675
2016
5,641
2014
5,627
2015
5,607
2022
5,501
2021
5,354
2012
5,250
2019
5,242
2011
5,005
2018
4,993
2017
4,968
2023
4,931
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
3,737
1999
2,952
2024
593
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 ...