1st January 1986—31st December 2000,80.1%,
1st January 1987—31st December 2000,74.7%,
1st January 1988—31st December 2000,67.6%,
1st January 1989—31st December 2000,58.6%,
1st January 1990—31st December 2000,47.4%,
1st January 1991—31st December 2000,32.9%,
1st January 1992—31st December 2000,27.7%,
1st January 1993—31st December 2000,23.2%,
1st January 1994—31st December 2000,21.1%,
1st January 1995—31st December 2000,18.4%,
1st January 1996—31st December 2000,14.0%,
1st January 1997—31st December 2000,11.7%,
1st January 1998—31st December 2000,7.8%,
1st January 1999—31st December 2000,4.4%,
1st January 2000—31st December 2000,3.3%,