7500                 
  
  
                      
1990 1991   720         142                862   
1991 1992   764         166                930  
1992 1993   798         175               973  
1993 1994   872          204            1067  
1994 1995   912          251            1163  
1995 1996   906          226            1132  
1996 1997   949          200            1149  
1997 1998   989          501         1490  
1998 1999   990          504        1494  
1999 2000   799          575         1374  
2000 2001   835          534          1369  
2001 2002   735          587          1322  
2002 2003   676          616           1292  
2003 2004   645          578           1223  
2004 2005   612          487            1113  
2005 2006   606          402             1008  
2006 2007   562          371             933  
2007 2008   513          328              841  
2008 2009   425          388               813  
2009 2010   384          382               766  
2010 2011   352          351               703  
2011 2012   322          293                615  
2012 2013   315          254                 569  
     
  
  
                                                                  20000              200           101                                                                                                                                           