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                Currents            L1 Rate / Hz from       
Year         HER / A   LER / A         HER      LER            
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2000          0.8       1.1            290      140            
2001          1.0       2.0            360      260            
2002          1.05      2.6            380      340            
2003          1.2       3.1            430      400            
2004          1.3       3.6            470      470            
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