Just for fun:
#!/usr/bin/perl
use strict;
use warnings;
my %cnt100kRange;
while (<DATA>) {
chomp;
my ($text, $count) = split;
next unless $text =~ /gene/;
$cnt100kRange{ substr( sprintf("%06d",$count),0,1) }++;
}
foreach my $range (sort keys %cnt100kRange) {
print "$range: $cnt100kRange{$range}\n";
}
__DATA__
gene 3936
gene 7591
gene 13082
gene 23200
gene 32518
gene 45123
gene 57330
gene 62384
gene 66839
gene 71715
gene 83427
gene 90948
gene 87510
gene 96042
gene 106380
gene 108247
gene 109395
gene 120121
gene 138410
gene 143225
gene 147455
gene 152452
gene 155580
gene 158939
gene 163483
gene 167583
gene 178450
gene 181546
gene 184301
gene 193505
gene 190880
gene 199431
gene 202844