1 0 0 0 Experimental Operational 2 1 1 November 1988 Operational 3 2 1 November 1993 Operational 4 3 2 November 1994 Operational 5 4 8 November 1995 Operational 6 5 6 November 1996 Operational 7 6 5 November 1997 Operational 8 7 4 November 1998 Operational 9 8 1 3 May 2000 Operational 10 9 8 November 2000 Operational 11 1 10 2 7 November 2001 Operational 12 2 11 3 5 November 2003 Operational 13 3 12 4 2 November 2005 Operational 14 4 13 5 7 November 2007 Operational 15 5 14 6 4 November 2009 Operational 16 6 15 7 15 September 2010 Operational 17 7 16 16 4 May 2011 Operational 18 8 17 17 2 November 2011 Operational 19 9 18 18 2 May 2012 Operational 20 10 19 19 7 November 2012 Operational 21 11 20 20 8 May 2013 Operational 22 12 21 21 14 November 2013 Operational 23 13 22 22 7 May 2014 Operational 24 14 23 23 5 November 2014 Operational 25 15 24 24 6 May 2015 Operational 26 16 25 25 11 November 2015 Operational 27 17 26 26 4 May 2016 Operational 28 18 27 27 2 November 2016 Operational 29 19 28 28 3 May 2017 Operational 30 20 29 29 8 November 2017 Operational 31 21 30 30 2 May 2018 Operational 32 22 31 31 7 November 2018 Operational 33 23 32 32 15 May 2019 Operational 34 24 33 33 Pre-operational to be implemented by next amendment Operational 35 25-254 34-254 34-254 Future versions Operational 36 255 255 255 Missing Operational