Since the entry into force of the Montreal Protocol, atmospheric concentrations of major chlorofluorocarbons and related chlorinated hydrocarbons have either decreased or decreased.  Halon concentrations have continued to increase due to the release of halons currently stored in fire extinguishers, but their rate of increase has slowed and their frequency is expected to decrease by approximately 2020. Similarly, the concentration of HFCs has increased dramatically, at least in part, since for many applications (e.g. B as solvents or refrigerants), CFCs have been replaced by HFCs. While individuals have reported attempts to circumvent the ban, for example. B by the smuggling of CFCs from developed non-developed countries, the overall level of compliance was high. Statistical analyses from 2010 show a clearly positive signal from the Montreal Protocol to stratospheric ozone.  As a result, the Montreal Protocol has often been referred to as the most successful international environmental agreement to date. In a 2001 report, NASA found that ozone depletion over Antarctica had remained the same over the past three years, but by 2003 the hole in the ozone layer had grown to its second largest size.  The most recent scientific assessment (2006) of the impact of the Montreal Protocol states that "the Montreal Protocol is working: there is clear evidence of a decrease in atmospheric exposure to ozone-depleting substances and some early signs of stratospheric ozone recovery."  However, a recent study suggests a relative increase in CFCs due to an unknown source.
 The Fund is managed by an Executive Committee composed equally of seven industrialized countries and seven countries in accordance with Article 5, elected annually by an Assembly of the Contracting Parties. Each year, the Committee reports on its activities to the Assembly of Parties. The Multilateral Fund`s work on the ground in developing countries is carried out by four implementing organizations that have concluded contractual agreements with the Executive Committee: Since 23 June 2015, all countries of the United Nations, the Cook Islands, the Holy See, Niue and the European Union have ratified the original Montreal Protocol (see external link below).  South Sudan was the last country to ratify the agreement, bringing the total to 197. . . .