query: SELECT
    (wd:Q2481549 as ?item) 
    ("fontsize:10,offset:5,angle:90" as ?showValues)
    ("line" as ?type)
    ("200" as ?heigth) 
    ("600" as ?width) 
    ("year/month" as ?xAxisTitle) 
    ("date" as ?xType) 
    ("monthly passengers (thousands)" as ?yAxisTitle)
    (GROUP_CONCAT(?month;separator=",") as ?x)
    (GROUP_CONCAT(?t;separator=",") as ?y)
  WHERE
  {
    { 
  
    SELECT ?month (ROUND(SUM(?passengers)/1000) as ?t)
    {
    wd:Q204853 p:P3872 [ ps:P3872 ?passengers ; pqv:P585 [ wikibase:timePrecision 10 ; wikibase:timeValue ?month ] ]
    FILTER( YEAR(?month)>2017)             
    }
    GROUP BY ?month
    ORDER BY DESC(?month)
    }
  }