Why now many pay searches engine bid low pity?

Type of Payment Quantity Earnings
Date: 05/18/2004 Clicks By Referrals 81 $0.4543
. [$ T# ^0 Y' x8 {6 T7 {. m# b2 M) F% PDate: 05/19/2004 Clicks By Referrals 141 $0.483
) A2 F7 T0 Q9 X. @, n( V. rDate: 05/26/2004 Clicks By Referrals 64 $0.1235
+ n$ v% D) h# L1 S
9 Y4 t0 H% G+ n" d: c" a# p
Why now many pay searches engine bid low pity?And has the more and more low tendency! Worried!