Yes, the annual fees did go down or remain flat from 1999 - 2001 at OKW, VB, HH and BWV. It was due to overestimated property taxes. Here is a history of the maintenance fees over the years.
Year OKW VB(s) VB HH - BWV VWL -BCV SSR AKV -BLT VGC
2010 4.87 5.18 6.61 5.57 5.36 5.20 5.15 4.46 4.95 3.78 3.94
2009 4.73 4.97 6.41 5.36 5.21 5.04 5.00 4.34 4.85 3.67 3.82
2008 4.56 4.71 6.04 5.16 5.04 4.87 4.80 4.21 4.71
2007 4.40 4.39 5.63 4.98 4.85 4.73 4.63 4.12 4.62
2006 4.24 4.12 5.27 4.34 4.69 4.61 4.48 3.98
2005 3.86 3.84 4.87 3.86 4.41 4.35 4.27 3.83
2004 3.68 3.67 4.67 3.70 4.25 4.22 4.18 3.80
2003 3.49 3.37 4.37 3.69 4.11 4.05 3.97
2002 3.22 3.33 4.17 3.49 3.92 3.80 3.77
2001 3.13 2.70 3.98 3.32 3.83 3.63
2000 3.16 2.87 4.07 3.25 3.94 3.62
1999 3.16 2.82 3.99 3.18 4.02
1998 3.17 2.76 ---- 3.20 3.94
1997 3.14 2.90 ---- 3.16 3.84
1996 2.99 2.82 ---- 3.16 3.70
1995 2.84 2.76
1994 2.70
1993 2.63
1992 2.56
1991 2.51