Change in total GHG emissions from transport

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

SELECT DISTINCT
bif:either(?geo = geo:UK, 'United Kingdom', ?country_name) as ?country_name
(round(( ( sum(?unfccc_crf_last) - sum(?unfccc_crf_first) )/ sum(?unfccc_crf_first) ) *1000))/10.0 as ?index

WHERE {
  { 
    GRAPH <http://r.eionet.europa.eu/rdfdumps/clrtap_nec_unfccc/unfccc_crf.rdf.gz> 
    {

      _:unfccc_crf clrtap_nec_unfccc:unit ?unit . 
      FILTER (?unit = 'Gg CO2 equivalent')
      _:unfccc_crf clrtap_nec_unfccc:pollutant_name ?pollutant_name . 
      FILTER (?pollutant_name = 'All greenhouse gases - (CO2 equivalent)')
      
      _:unfccc_crf clrtap_nec_unfccc:country_code ?geo .
      _:unfccc_crf clrtap_nec_unfccc:sector_code ?sector .
      FILTER (?sector in (sector:1.A.3, sector:1.D.1.a)) . 
      {
        _:unfccc_crf clrtap_nec_unfccc:year ?year . FILTER ((?year) = '1990')
        _:unfccc_crf clrtap_nec_unfccc:emissions ?unfccc_crf_first .
      } UNION {
        _:unfccc_crf clrtap_nec_unfccc:year ?year . FILTER ((?year) = '2015')
        _:unfccc_crf clrtap_nec_unfccc:emissions ?unfccc_crf_last .
      }
    }
    ?geo rdfs:label ?country_name .
  }
}
GROUP BY ?country_name ?geo
ORDER BY ?country_name