CB001: 26 September 1988 SIG SHARED CB002 and CB003: 07 April 1995 SIG SHARED CB004 and CB005: 14 April 1995 SIG (Not recorded: already shared] CB006 and CB007: 21 July 1995 SIG SHARED CB008 and CB009: 08 September 1995 SIG SHARED CB010 and CB011: 10 November 1995 SIG SHARED CB012: 28 May 1997 SIG SHARED CB013: 20 January 1999 SIG SHARED CB014, CB015, CB016 and CB017: 26 December 2002 SIG SHARED CB018: 07 February 1990 SIG SHARED CB019: 24 May 1990 SIG SHARED CB020: 28 October 1990 SIG SHARED CB021: 18 November 1990 SIG SHARED CB022 and CB023: 01 March 1992 SIG SHARED CB024: 05 December 1992 SIG SHARED