Cannot select items in a particular drop down menu

I am doing some web scraping using Selenium and Beautiful Soup in python. This is the website I am scraping data from.

from bs4 import BeautifulSoup as soup
from selenium import webdriver
from selenium.webdriver.support.ui import Select

driver = webdriver.Firefox()
driver.get("http://www.forex.pk/foreign-exchange-rate.htm")

forex_soup = soup(driver.page_source,"html.parser")

Selecting 10 decimal places from the drop down menu works:

Select(driver.find_element_by_id('decimals')).select_by_value("10")

Clicking the submit button also works:

driver.find_element_by_id('btnShow').click()

However, I can't seem to select the base currency. What am I doing wrong? I have tried the following:

Select(driver.find_element_by_id('currid')).select_by_index(3)

and

Select(driver.find_element_by_id('currid')).select_by_value("3")

Also note that while there are 78 currencies, the following returns 9. I guess only the currencies above the "------" item are being included. How do I get all the options?

len(Select(driver.find_element_by_id('currid')).select_by_index(n).options)