Statements I've made were based on the various GERS report, It's been a while since I've looked into this so I'll certainly stand corrected if new figures have been published this year, but i dare say it won't be far off the UK economic trend indicators if they are different. Essentially the unionist parties will use economic statistics for Scotland without, or reduced oil revenue and the SNP will use the statistics with a share of the oil included.
Thanks d88, I suppose the point I was trying to make is that while the Scottish have a legitimate complaint that they are getting less than they pay for and in effect subsidising the UK, this also appears to be true of England (based of the information I quoted), and that collectively Scotland and England are subsiding NI and Wales. So you can see why some English people get a tad annoyed (any annoyance I might feel towards the SNP stems from many years ago when I lived in Scotland and was dating a Scottish lass who friend was a prospective SNP party member who effectively told me that Scottish girls where off limits to me as I was English!)