Ámbito geográfico
UNITED STATES
37
ESTADOS UNIDOS
8
CHINA
3
ARGENTINA
2
DEVELOPING COUNTRIES
2
EUROPE
2
EUROPEAN ECONOMIC COMMUNITY COUNTRIES
2
EUROPEAN UNION COUNTRIES
2
JAPAN
2
OECD COUNTRIES
2
AFRICA, SUB-SAHARAN
1
ASIA
1
BRAZIL
1
CANADA
1
CUBA
1
EUROPA
1
GERMANY
1
GREAT BRITAIN
1
LATIN AMERICA
1
RUSSIA (FEDERATION)
1