12th April 1999 to 25th April 1999,1·10%,
26th April 1999 to 25th May 1999,1·01%,
26th May 1999 to 25th June 1999,0·92%,
26th June1999 to 25th July 1999,0·83%,
26th July 1999 to 25th August 1999,0·73%,
26th August 1999 to 25th September 1999,0·64%,
26th September 1999 to 25th October 1999,0·55%,
26th October 1999 to 25th November 1999,0·46%,
26th November 1999 to 25th December 1999,0·37%,
26th December 1999 to 25th January 2000,0·28%,
26th January 2000 to 25th February 2000,0·18%,
26th February 2000 to 25th March 2000,0·09%,
26th March 2000 onwards,Nil,