Key-value codes for just the first two digits of the ICDO-3 code. This gives broader grouping. Based on the table of contents from: http://www.socialstyrelsen.se/Lists/Artikelkatalog/Attachments/19446/2014-5-12.pdf
Other key_value_data: distrikt,
figo, forsamling,
hemort, hsn,
icd10, icd7_grov,
icd7, icd9,
icdo3, icdo,
klinik, kommun,
kon, lan,
m_rtr, n_rtr,
pad, patologiavdelning,
rc, region,
sida, sjukhus_inca,
sjukhus_par, sjukhus,
sjukvardsomrade, snomed3,
snomed, t_rtr,
tnmgrund