That small typo 'fileds' (fields) obscured the meaning of your question for me, and rereading it I think that what you wanted is really more like this:

(again, I've implemented against postgres, but if you take out the DB stuff you can use CSV output (the outcommented lines))

use strict;
use warnings;
use DBI;
my $t   = "pm1083865_ivo2"; # table name
my $date_string ;
my @hdr = ();
my @val = ();
while (<>) {  # reading STDIN
  chomp;
  $date_string = $_;
  last;
}
while (<>) {  # reading STDIN
  next if (/^\s*$/);
  chomp;
  if ( /^([^:]+):\s*(\d+)\s*$/ ) {
    push(@hdr, $1); push(@val, $2); 
  }
  elsif ( /^([^:]+):\s*(\d+)\s*([^:]+):\s*(\d+)\s*$/ ) {
    push(@hdr, $1); push(@val, $2); 
    push(@hdr, $3); push(@val, $4); 
  }
  else {
    print ">>>", $_ ,"<<<\n";
    die "oops - unprocessed line!\n";
  }
}
# clean up header names for database use:
for (my$i=0;$i<scalar(@hdr);$i++) {
    $hdr[$i] = lc($hdr[$i]);  #  lower case
    $hdr[$i] =~ s{[-]}{_}g;   #  change dash to underscore
    $hdr[$i] =~ s{[ ]}{_}g;   #  change space to underscore
    $hdr[$i] =~ s{_[_]+}{_}g; #
}
my @all_hdrs = (); push(@all_hdrs, "date_line" ); push(@all_hdrs, @hdr
+);
my @all_vals = (); push(@all_vals, $date_string); push(@all_vals, @val
+);
# use only this line to get a output csv
# print join("\t", @all_hdrs), "\n", join("\t", @all_vals), "\n";
# exit;
my $dbh = DBI->connect or die "no database connection - $!\n ";
$dbh->{AutoCommit} = 0;
$dbh->{RaiseError} = 1;
my $arf = $dbh->selectrow_arrayref("
   select count(*) from information_schema.tables
   where table_schema = 'public' and table_name = '$t'");
if ($arf->[0] == 0) {
    my $sql_create = join("\n"
      , "create table $t ("
      ,  " date_line timestamptz\n, "
      ,  join ("\n, ", map { $_ .= ' integer' } @hdr )
      , ");"
    );
    $dbh->do( $sql_create );
}
my $sql_insert = join("\n"
      , "insert into $t values ("
      ,  join( ", ", map {'?'} @all_hdrs)
      , ");"
);
my $sth = $dbh->prepare($sql_insert);
my $rc  = $sth->execute(@all_vals);
$dbh->commit;
$dbh->disconnect;
[download]

After running that (showing record vertically):

$ echo "table pm1083865_ivo2" | psql -x | head -n 20
Timing is on.
-[ RECORD 1 ]-----------------+-----------------------
date_line                     | 2014-04-25 23:06:25+02
total_subscribers             | 970260
active                        | 86806
dormant                       | 883454
pdsn_simple_ipv4              | 212
pdsn_simple_ipv6              | 0
pdsn_mobile_ip                | 539792
ha_mobile_ipv6                | 0
hsgw_ipv6                     | 234943
hsgw_ipv4                     | 1977
hsgw_ipv4_ipv6                | 192328
pgw_pmip_ipv6                 | 0
pgw_pmip_ipv4                 | 0
pgw_pmip_ipv4_ipv6            | 0
pgw_gtp_ipv6                  | 0
pgw_gtp_ipv4                  | 0
pgw_gtp_ipv4_ipv6             | 0
sgw_gtp_ipv6                  | 0
[...]

etc., there are 126 columns
[download]