Trend in emissions of air pollutants from transport, CO

PREFIX clrtap_nec_unfccc: <http://reference.eionet.europa.eu/clrtap_nec_unfccc/schema/>
PREFIX country: <http://reference.eionet.europa.eu/clrtap_nec_unfccc/country/>
PREFIX sector: <http://reference.eionet.europa.eu/clrtap_nec_unfccc/clrtap_nec_nfr09_sector/>

SELECT
?year 
?pollutant_name
#sum(xsd:double(?emissions)) as ?emissions
#sum(xsd:double(?emissions_idx)) as ?emissions_idx
xsd:double((round((sum(?emissions))/sum(?emissions_idx)*1000))/10.0) as ?index

WHERE {{  
  GRAPH <http://r.eionet.europa.eu/rdfdumps/clrtap_nec_unfccc/clrtap_nfr09_gf.rdf.gz> 
  {
   ?clrtap_nfr09_gf clrtap_nec_unfccc:country_code ?country_code .
   ?clrtap_nfr09_gf clrtap_nec_unfccc:pollutant_name ?pollutant_name .
   ?clrtap_nfr09_gf clrtap_nec_unfccc:year ?year .
   ?clrtap_nfr09_gf clrtap_nec_unfccc:sector_code ?sector_code .
   ?clrtap_nfr09_gf clrtap_nec_unfccc:emissions ?emissions .
 
   OPTIONAL { SELECT 
       ?country_code
       ?pollutant_name
       ?sector_code
       ?emissions_idx
     WHERE {
       ?clrtap_nfr09_gf_idx clrtap_nec_unfccc:country_code ?country_code .
       ?clrtap_nfr09_gf_idx clrtap_nec_unfccc:pollutant_name ?pollutant_name .
       ?clrtap_nfr09_gf_idx clrtap_nec_unfccc:year '1990' .
       ?clrtap_nfr09_gf_idx clrtap_nec_unfccc:sector_code ?sector_code .
       ?clrtap_nfr09_gf_idx clrtap_nec_unfccc:emissions ?emissions_idx .
     }
   }

   FILTER (?sector_code in (
     sector:1A3bi,
     sector:1A3bii,
     sector:1A3biii,
     sector:1A3biv,
     sector:1A3bv,
     sector:1A3bvi,
     sector:1A3bvii,
     sector:1A3c,
     sector:1A3dii,
     sector:1A4ciii,
     <http://reference.eionet.europa.eu/clrtap_nec_unfccc/clrtap_nec_nfr09_sector/1A3di(i)>,
     <http://reference.eionet.europa.eu/clrtap_nec_unfccc/clrtap_nec_nfr09_sector/1A3di(ii)>,
     <http://reference.eionet.europa.eu/clrtap_nec_unfccc/clrtap_nec_nfr09_sector/1A3aii(i)>,
     <http://reference.eionet.europa.eu/clrtap_nec_unfccc/clrtap_nec_nfr09_sector/1A3aii(ii)>,
     <http://reference.eionet.europa.eu/clrtap_nec_unfccc/clrtap_nec_nfr09_sector/1A3ai(i)>,
     <http://reference.eionet.europa.eu/clrtap_nec_unfccc/clrtap_nec_nfr09_sector/1A3ai(ii)>
   ))
   
   #FILTER (?pollutant_name in ('NOx', 'NMVOC', 'CO', 'SOx'))
   #to be changed with EEA33
   FILTER (?country_code in (country:EU28, country:TR, country:NO, country:IS, country:LI, country:CH))
   #FILTER (?country_code in (country:TR))

   FILTER (?pollutant_name in ('CO'))
   #FILTER (?country_code in (country:EU28))
  }
}}
GROUP BY ?year ?pollutant_name
ORDER BY ?year ?pollutant_name