Can I import customer data from Zoho Invoice to Zoho CRM?

Can I import customer data from Zoho Invoice to Zoho CRM?

I have been using zoho invoice for a couple of years and have built up my client list here. I am now giving Zoho CRM a shot and am hoping I can get a lot of my already established data (financial trading records) over to zoho crm? 

Can anyone tell me if this is possible and how can I do it?