1997 12 | OECD | | | | | 2001 2008 | | 2001 | | 2013 | | | | 2014 4 | | | | | 2016 9 | | 2021 3 | | | | | | | | | | | | | | | | | 18 | | | | | | | | | | | | | | | | ⒈ | | | | | | | | ⒉ | | | | | | | | | | ⒊ | | | | | | ⒋ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ⒈ | 7% 38% 55 % | | | | | | | | | ⒉ | | ⒊ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |