| <table> |
| <thead> |
| <tr> |
| <th> |
| Year |
| </th> |
| <th> |
| </th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td> |
| 1970 |
| </td> |
| <td> |
| Ecuador |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1971 |
| </td> |
| <td> |
| Japan, Libya, Spain |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1972 |
| </td> |
| <td> |
| Cuba, France, Syrian Arab Republic, Zambia |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1973 |
| </td> |
| <td> |
| Australia, Cameroon, Mexico, Netherands |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1974 |
| </td> |
| <td> |
| Burkina Faso, Iraq, Nepal |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1975 |
| </td> |
| <td> |
| Romania, SriLanka |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1976 |
| </td> |
| <td> |
| Egypt, Nicaragua, Yemen |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1977 |
| </td> |
| <td> |
| Bolivia (Plurinational State of), Lebanon, Uruguay |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1978 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1979 |
| </td> |
| <td> |
| Costa Rica, Kenya |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1980 |
| </td> |
| <td> |
| Niger |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1981 |
| </td> |
| <td> |
| Eswatini |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1982 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1983 |
| </td> |
| <td> |
| Brazil, Guyana, Portugal, United Republic of Tanzania |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1984 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1985 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1986 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1987 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1988 |
| </td> |
| <td> |
| Guatemala, Malta |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1989 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1990 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1991 |
| </td> |
| <td> |
| North Macedonia |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1992 |
| </td> |
| <td> |
| Slovenia |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1993 |
| </td> |
| <td> |
| Azerbaijan, Bosnia and Herzegovina, Latvia |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1994 |
| </td> |
| <td> |
| Lithuania |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1995 |
| </td> |
| <td> |
| El Salvador |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1996 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1997 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1998 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 1999 |
| </td> |
| <td> |
| Chile |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2000 |
| </td> |
| <td> |
| Republic of Moldova, Serbia |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2001 |
| </td> |
| <td> |
| Republic of Korea |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2002 |
| </td> |
| <td> |
| Antigua and Barbuda |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2003 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2004 |
| </td> |
| <td> |
| Albania |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2005 |
| </td> |
| <td> |
| Armenia |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2006 |
| </td> |
| <td> |
| Central African Republic, Montenegro, Ukraine |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2007 |
| </td> |
| <td> |
| Kyrgyzstan |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2008 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2009 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2010 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2011 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2012 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2013 |
| </td> |
| <td> |
| Morocco |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2014 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2015 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2016 |
| </td> |
| <td> |
| Malaysia |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2017 |
| </td> |
| <td> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| 2018 |
| </td> |
| <td> |
| Bulgaria |
| </td> |
| </tr> |
| <tr> |
| <td> |
| Total |
| </td> |
| <td> |
| 54 ratifications |
| </td> |
| </tr> |
| </tbody> |
| </table> |