** date ** baggeren ** storten ** zandwinning ** wrak ** totaal ** cumulatief == 01/01/1955 NaN NaN NaN NaN NaN 0.000000E+000 31/12/1955 NaN NaN NaN NaN NaN 0.000000E+000 31/12/1956 NaN NaN -2.640000E+004 NaN -2.640000E+004 -2.640000E+004 31/12/1957 NaN NaN -2.252273E+004 NaN -2.252273E+004 -4.892273E+004 31/12/1958 NaN NaN -2.506909E+004 NaN -2.506909E+004 -7.399182E+004 31/12/1959 NaN NaN -3.567909E+004 NaN -3.567909E+004 -1.096709E+005 31/12/1960 NaN NaN -1.361000E+004 NaN -1.361000E+004 -1.232809E+005 31/12/1961 NaN NaN -1.132030E+006 NaN -1.132030E+006 -1.255311E+006 31/12/1962 NaN NaN -3.347409E+005 NaN -3.347409E+005 -1.590052E+006 31/12/1963 NaN NaN -9.909091E+003 NaN -9.909091E+003 -1.599961E+006 31/12/1964 NaN NaN -4.322982E+005 NaN -4.322982E+005 -2.032259E+006 31/12/1965 NaN NaN -4.337336E+005 NaN -4.337336E+005 -2.465993E+006 31/12/1966 NaN NaN -1.025364E+004 NaN -1.025364E+004 -2.476246E+006 31/12/1967 NaN NaN -3.611791E+005 NaN -3.611791E+005 -2.837425E+006 31/12/1968 NaN NaN -6.327800E+005 NaN -6.327800E+005 -3.470205E+006 31/12/1969 -2.195173E+006 2.468374E+006 -4.986364E+003 NaN 2.682143E+005 -3.201991E+006 31/12/1970 -6.338835E+005 7.324823E+005 -1.168155E+005 NaN -1.821662E+004 -3.220208E+006 31/12/1971 -1.385785E+006 8.527015E+005 -1.072727E+004 NaN -5.438106E+005 -3.764018E+006 31/12/1972 -1.914659E+006 1.041435E+006 -2.878364E+004 NaN -9.020070E+005 -4.666025E+006 31/12/1973 -7.728743E+004 2.258545E+003 -6.529273E+004 NaN -1.403216E+005 -4.806347E+006 31/12/1974 -2.161647E+006 4.845650E+005 -8.047191E+005 NaN -2.481801E+006 -7.288148E+006 31/12/1975 -1.719824E+006 2.483796E+006 -1.856600E+005 NaN 5.783120E+005 -6.709836E+006 31/12/1976 -1.277534E+005 1.219866E+006 -7.123909E+004 NaN 1.020874E+006 -5.688962E+006 31/12/1977 -1.070960E+005 1.796471E+006 -8.728818E+004 NaN 1.602087E+006 -4.086875E+006 31/12/1978 -2.846285E+005 2.578496E+006 -3.850127E+005 NaN 1.908855E+006 -2.178020E+006 31/12/1979 -2.026617E+005 4.253371E+006 -2.529455E+005 NaN 3.797764E+006 1.619744E+006 31/12/1980 -2.918422E+005 2.871964E+006 -4.051655E+005 NaN 2.174956E+006 3.794700E+006 31/12/1981 NaN 2.237023E+006 -3.601500E+005 NaN 1.876873E+006 5.671573E+006 31/12/1982 -2.821204E+006 1.753921E+006 -3.602364E+005 NaN -1.427519E+006 4.244054E+006 31/12/1983 -3.173413E+005 1.723082E+006 -3.288282E+005 NaN 1.076912E+006 5.320966E+006 31/12/1984 NaN 1.274500E+006 -3.232864E+005 NaN 9.512137E+005 6.272180E+006 31/12/1985 -3.633702E+005 2.597120E+006 -3.237864E+005 NaN 1.909963E+006 8.182143E+006 31/12/1986 -3.565000E+005 2.337365E+006 -3.547673E+005 NaN 1.626098E+006 9.808241E+006 31/12/1987 -1.311080E+005 2.922632E+006 -3.583373E+005 NaN 2.433186E+006 1.224143E+007 31/12/1988 NaN 2.955208E+006 -2.808745E+005 NaN 2.674334E+006 1.491576E+007 31/12/1989 NaN 2.765129E+006 -1.343582E+005 NaN 2.630771E+006 1.754653E+007 31/12/1990 -5.433349E+005 2.434731E+006 -2.245027E+005 NaN 1.666893E+006 1.921343E+007 31/12/1991 -4.413496E+005 3.431563E+006 -2.015555E+005 NaN 2.788658E+006 2.200208E+007 31/12/1992 -2.706906E+005 2.283367E+006 -2.616592E+005 NaN 1.751017E+006 2.375310E+007 31/12/1993 -3.048392E+005 1.699871E+006 -3.939133E+005 NaN 1.001118E+006 2.475422E+007 31/12/1994 -9.904363E+005 3.291013E+006 -2.666267E+005 NaN 2.033950E+006 2.678817E+007 31/12/1995 -1.587076E+006 4.327847E+006 -1.839123E+005 NaN 2.556858E+006 2.934503E+007 31/12/1996 -1.108308E+006 4.346448E+006 -2.060067E+005 NaN 3.032133E+006 3.237716E+007 31/12/1997 -3.381283E+005 3.082476E+006 -1.629951E+005 NaN 2.581352E+006 3.495851E+007 31/12/1998 -1.703670E+006 3.954352E+006 -4.782984E+005 NaN 1.772383E+006 3.673090E+007 31/12/1999 -2.278320E+006 3.791939E+006 -8.201947E+005 NaN 6.934249E+005 3.742432E+007 31/12/2000 -9.723252E+005 3.797825E+006 -1.059144E+006 4.545455E+005 2.220901E+006 3.964522E+007 31/12/2001 -1.334330E+006 4.007351E+006 -6.927272E+005 NaN 1.980293E+006 4.162551E+007 31/12/2002 -8.857702E+005 3.220953E+006 -2.887220E+005 NaN 2.046461E+006 4.367197E+007 31/12/2003 -8.295125E+005 3.711060E+006 -2.492988E+005 4.783673E+005 3.110616E+006 4.678259E+007 31/12/2004 -3.750264E+005 1.716760E+006 -2.507313E+005 NaN 1.091002E+006 4.787359E+007 31/12/2005 -7.656645E+005 7.206182E+005 -2.340955E+005 NaN -2.791418E+005 4.759445E+007 31/12/2006 -7.143273E+004 1.048744E+006 -2.317909E+005 NaN 7.455200E+005 4.833997E+007 31/12/2007 -7.403936E+005 9.010982E+005 -2.778909E+005 NaN -1.171864E+005 4.822279E+007 31/12/2008 -1.801818E+003 3.755138E+006 -2.739045E+005 NaN 3.479432E+006 5.170222E+007