Why now many pay searches engine bid low pity?

Type of Payment Quantity Earnings
  \' o) d3 o4 |% {0 m# cDate: 05/18/2004 Clicks By Referrals 81 $0.4543
Date: 05/19/2004 Clicks By Referrals 141 $0.483
( h# R, i' D# V1 ^6 F2 |Date: 05/26/2004 Clicks By Referrals 64 $0.1235
6 |6 I% w5 _% |% p% P
$ r+ X4 C# B4 J8 E. @
" B' L5 y$ b$ v# `9 V: N0 fWhy now many pay searches engine bid low pity?And has the more and more low tendency! Worried!