http://btc.blockr.io/charts  

gives 1 day totals in fact bitcoincharts uses them as a source



Feb 9 --- 162 but a lot of this went to last jump


feb 10---142
feb 11---159
feb 12---124
feb 13---144
feb 14---160-----------------------this is pretty high but this day we had the nice price rally
feb 15---142
feb 16---158
feb 17---149
feb 18---161


9 x 144 = 1296   actual is 1339 this is  about  3.31 to 3.35%

looks like            wpt1wpt1 +3.45%     and   tertius993 +3.22%  are close to a dead heat

GermanGiant +3.00%
notlist3d +4.15%
HerbPean +4.20%

all stand a shot

https://bitcoinwisdom.com/bitcoin/difficulty

 shows a surge and is pushing for  (+5.32%)  This needs  all days left to average  over 152 blocks to happen

Bitcoin Difficulty:   44,455,415,962
Estimated Next Difficulty:   46,821,133,047 (+5.32%)
Adjust time:   After 586 Blocks, About 3.9 days
Hashrate(?):   354,653,668 GH/s
Block Generation Time(?):   
1 block: 9.5 minutes
3 blocks: 28.4 minutes
6 blocks: 56.9 minutes
Updated:   22:45 (49.0 seconds ago)