Why now many pay searches engine bid low pity?

Type of Payment Quantity Earnings
Date: 05/18/2004 Clicks By Referrals 81 $0.4543
Date: 05/19/2004 Clicks By Referrals 141 $0.483
Date: 05/26/2004 Clicks By Referrals 64 $0.1235

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: O0 f0 Q" X1 ]8 d/ ]% ?3 qWhy now many pay searches engine bid low pity?And has the more and more low tendency! Worried!