| Symbol | Date | Installment |
18 December 1997 | First Instalment, Part One | |
12 March 1998 | First Instalment, Part Two | |
2 October 1998 | Second Instalment | |
19 March 1999 | Third Instalment | |
15 June 2000 | Fourth Instalment | |
22 June 2001 | Fifth Instalment | |
13 March 2002 | Sixth Instalment |