https://www.uktradeinfo.com/Statistics/OverseasTradeStatistics/Pages/EU_and_Non-EU_Data.aspx
And you're being selective with your figures. I'll help you by posting the one you're avoiding mentioning
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I think looking at the cash value of imports and exports is less important than the proportion, given the big difference between the size of the UK economy and the collective rEU economy. Is that unfair? Why?
Furthermore, you basically claim that trade will continue as now just because it's sensible financially... but the finances are one consideration. Eg. why would the EU give the UK all the benefits of the EU without any of the obligations? Eg. a contribution to its budget/accepting free movement of people/etc? If they did, what would stop other countries following the UK out of the door? Why would France and Germany want to stay in the EU if they could 'do a UK' and leave whilst retaining all the benefits?