Quality results using derf "illumina_qual.pl" script

Illumina fastq file	SRR488142.fastq_1
number of lines:	270197620
number of sequencers:	67549405
length of sequences:	100
no sequence name errors detected
no sequence quality name errors detected
no sequence length errors detected
no unexpected sequence characters found
minimal quality score:	#
maximal quality score:	I
reads with first 30 bases high quality (quality >= @):	48827752
reads with first 50 bases high quality (quality >= @):	34435674
reads with first 70 bases high quality (quality >= @):	14018908
reads with all 100 bases high quality (quality >= @):	500939

Illumina fastq file	SRR488142.fastq_2
number of lines:	270197620
number of sequencers:	67549405
length of sequences:	100
no sequence name errors detected
no sequence quality name errors detected
no sequence length errors detected
no unexpected sequence characters found
minimal quality score:	#
maximal quality score:	I
reads with first 30 bases high quality (quality >= @):	45482661
reads with first 50 bases high quality (quality >= @):	30467562
reads with first 70 bases high quality (quality >= @):	20627345
reads with all 100 bases high quality (quality >= @):	2479660