Get employee with least work

i have a table as follows:

create table "ITMS_JobCardActorStatusHistory" (
"jobCardNo" int identity not null,
"issueID" int not null,
"assignedTo" char(5) not null, /*this is emp id*/
"assignedDate" datetime not null,
"closedDate" datetime null,
"jobFixDescription" varchar(100) null,
"estimatedTime" int null)
go

I need to get the employee with least work, i.e, the employee with least number of enteries in this table. How can i do it? Please help me out.
Thanks in advance!!