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| Col (1) SDP | Col (2) SRG | Col (3) SZL | Col (4) SYP | Col (5) TZS |
| SDP | SRG | SZL | SYP | TZS |
| 1993 : 1999 | 1993 : 2003 | 1993 : 2010 | 1993 : 2010 | 1993 : 2010 |
2010 yr avg na na 7.3089 46.240 1438.0
2009 yr avg na na 8.4429 46.519 1328.2
2008 yr avg na na 8.3400 46.552 1216.6
2007 yr avg na na 7.0292 49.896 1233.0
2006 yr avg na na 6.8183 52.227 1246.6
2005 yr avg na na 6.3700 52.924 1132.1
2004 yr avg na na 6.3733 51.724 1089.7
2003 yr avg na 2700.0 7.4958 51.500 1041.0
2002 yr avg na 2597.8 10.413 51.567 965.56
2001 yr avg na 2212.7 8.7400 46.000 872.91
2000 yr avg na 2130.0 7.0045 46.000 794.00
1999 yr avg 2509.3 836.11 6.1421 46.000 741.40
1998 yr avg 1977.4 396.00 5.5828 46.000 657.08
1997 yr avg 1582.0 398.00 4.6280 44.433 612.25
1996 yr avg 1156.3 398.00 4.3329 26.600 581.20
1995 yr avg 625.63 487.43 3.6400 26.600 568.40
1994 yr avg 360.60 263.67 3.5388 26.600 516.00
1993 yr avg 215.00 83.400 3.3700 26.600 484.00