def value
      match  = text_value.match(/(')?(\d{2,4})/)
      value  = match[2].to_i
      value += 2000 if match[1]
      value
    end
def value
      match  = text_value.match(/(')?(\d{2,4})/)
      value  = match[2].to_i
      value += 2000 if match[1]
      value
    end
:nodoc: