regional

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

The americas

37

45

49

40

37

36

38

35

28

33

32

36

The European

17

24

15

26

15

20

23

16

20

20

22

25

Asia

17

19

19

12

18

22

18

19

20

6

12

13

Africa

13

14

9

13

14

9

19

19

19

16

16

15

Oceania

7

7

10

7

11

6

4

9

5

0

0

1

A total of

91

109

102

98

95

95

102

98

92

75

82

90