Waste generation per capita

PREFIX sdmx-measure: <http://purl.org/linked-data/sdmx/2009/measure#> 
PREFIX sdmx-dimension: <http://purl.org/linked-data/sdmx/2009/dimension#> 
PREFIX sdmx-attribute: <http://purl.org/linked-data/sdmx/2009/attribute#> 
PREFIX skos: <http://www.w3.org/2004/02/skos/core#> 
PREFIX property: <http://rdfdata.eionet.europa.eu/eurostat/property#> 
PREFIX geo: <http://dd.eionet.europa.eu/vocabulary/eurostat/geo/>
PREFIX common_countries: <http://dd.eionet.europa.eu/vocabulary/common/countries/>


SELECT DISTINCT
bif:either(year(?date) >= 2008, 2014, year(?date) ) as ?date
year(?date) as ?originalYear
?ugeo
?obsValue
WHERE {{
    GRAPH <http://rdfdata.eionet.europa.eu/eurostat/data/tsdpc210.rdf.gz> 
    {{
    _:tsdpc210 sdmx-dimension:timePeriod ?date . 
    _:tsdpc210 property:nace_r2 ?nace_r2 . 
    _:tsdpc210 property:hazard ?hazard . 
    _:tsdpc210 property:waste ?waste . 
    _:tsdpc210 sdmx-dimension:refArea ?geo . 
    _:tsdpc210 sdmx-attribute:unitMeasure ?unit . 
    _:tsdpc210 sdmx-measure:obsValue ?obsValue .


      #select the max year per country
      {
          SELECT DISTINCT
            max(?date) as ?date
            ?geo
          WHERE {{
           GRAPH <http://rdfdata.eionet.europa.eu/eurostat/data/tsdpc210.rdf.gz> 
              {{
                _:tsdpc210 sdmx-dimension:timePeriod ?date .
                _:tsdpc210 sdmx-dimension:refArea ?geo . 
                _:tsdpc210 sdmx-measure:obsValue ?obsValueFilter .
              }}
              FILTER ( ?obsValueFilter > 0 )
          }}
          GROUP BY ?geo 
      } UNION {
        {
      #select 2004 year per country
          SELECT DISTINCT
            ?date
            ?geo
          WHERE {{
            GRAPH <http://rdfdata.eionet.europa.eu/eurostat/data/tsdpc210.rdf.gz> 
            {{
              _:tsdpc210 sdmx-dimension:timePeriod ?date .
              _:tsdpc210 sdmx-dimension:refArea ?geo .
              FILTER (year(?date) = 2004)
            }}
          }}
          GROUP BY ?geo 
        }
      }
    }}
    ?geo skos:exactMatch ?eeauri .
    ?eeauri skos:inScheme <http://dd.eionet.europa.eu/vocabulary/common/countries/> .
    ?eeauri rdfs:label ?ugeo .
}}
GROUP BY ?ugeo ?geo ?date
ORDER BY ?ugeo