{
 "schema_version": 1,
 "metric_id": "M3",
 "name": "Volunteering",
 "domain": "M",
 "tier": "v1",
 "grade": "B",
 "frequency": "A",
 "harmonized_international": false,
 "caveats": "Organised volunteering (for clubs or organisations) in the last 12 months. The 2020-21 dip is real — COVID restrictions stopped organised volunteering — not a survey artefact. Weekly social-contact series ride along as detail lines.",
 "methodology_notes": "Verified 9 Jul 2026: 85541NED (includes the 2012+ backfill of its discontinued predecessor 82249NED). Kenmerken T009002, point estimates only. Volunteering 2012: 50.5% -> 2025: 47.0%.",
 "owner_review_required": false,
 "sources": [
  {
   "org": "CBS",
   "dataset_code": "85541NED",
   "licence": "CC BY 4.0 (CBS)"
  }
 ],
 "breaks": [],
 "primary": {
  "key": "CBS|85541NED|NL|%|Kenmerken=T009002,Marges=MW00000,topic=Totaal_33",
  "dataset_code": "85541NED",
  "source_org": "CBS",
  "unit_code": "%",
  "unit_label": "%",
  "dimensions": {
   "Marges": "MW00000",
   "Kenmerken": "T009002",
   "topic": "Totaal_33"
  },
  "frequency": "A",
  "points": [
   {
    "period": "2012",
    "value": 50.5
   },
   {
    "period": "2013",
    "value": 49.1
   },
   {
    "period": "2014",
    "value": 48.0
   },
   {
    "period": "2015",
    "value": 48.7
   },
   {
    "period": "2016",
    "value": 49.7
   },
   {
    "period": "2017",
    "value": 48.5
   },
   {
    "period": "2018",
    "value": 47.6
   },
   {
    "period": "2019",
    "value": 46.7
   },
   {
    "period": "2020",
    "value": 43.8
   },
   {
    "period": "2021",
    "value": 38.9
   },
   {
    "period": "2022",
    "value": 41.2
   },
   {
    "period": "2023",
    "value": 48.7
   },
   {
    "period": "2024",
    "value": 49.5
   },
   {
    "period": "2025",
    "value": 47.0
   }
  ]
 },
 "series": [
  {
   "key": "CBS|85541NED|NL|%|Kenmerken=T009002,Marges=MW00000,topic=Minstens1xPerWeek_2",
   "dataset_code": "85541NED",
   "source_org": "CBS",
   "unit_code": "%",
   "unit_label": "%",
   "dimensions": {
    "Marges": "MW00000",
    "Kenmerken": "T009002",
    "topic": "Minstens1xPerWeek_2"
   },
   "frequency": "A",
   "points": [
    {
     "period": "2012",
     "value": 52.8
    },
    {
     "period": "2013",
     "value": 54.3
    },
    {
     "period": "2014",
     "value": 54.2
    },
    {
     "period": "2015",
     "value": 52.9
    },
    {
     "period": "2016",
     "value": 51.9
    },
    {
     "period": "2017",
     "value": 51.7
    },
    {
     "period": "2018",
     "value": 49.8
    },
    {
     "period": "2019",
     "value": 49.0
    },
    {
     "period": "2020",
     "value": 50.0
    },
    {
     "period": "2021",
     "value": 49.9
    },
    {
     "period": "2022",
     "value": 50.9
    },
    {
     "period": "2023",
     "value": 50.5
    },
    {
     "period": "2024",
     "value": 50.3
    },
    {
     "period": "2025",
     "value": 50.0
    }
   ]
  },
  {
   "key": "CBS|85541NED|NL|%|Kenmerken=T009002,Marges=MW00000,topic=Minstens1xPerWeek_7",
   "dataset_code": "85541NED",
   "source_org": "CBS",
   "unit_code": "%",
   "unit_label": "%",
   "dimensions": {
    "Marges": "MW00000",
    "Kenmerken": "T009002",
    "topic": "Minstens1xPerWeek_7"
   },
   "frequency": "A",
   "points": [
    {
     "period": "2012",
     "value": 47.0
    },
    {
     "period": "2013",
     "value": 48.4
    },
    {
     "period": "2014",
     "value": 48.0
    },
    {
     "period": "2015",
     "value": 47.2
    },
    {
     "period": "2016",
     "value": 47.7
    },
    {
     "period": "2017",
     "value": 47.8
    },
    {
     "period": "2018",
     "value": 47.5
    },
    {
     "period": "2019",
     "value": 46.1
    },
    {
     "period": "2020",
     "value": 45.6
    },
    {
     "period": "2021",
     "value": 45.3
    },
    {
     "period": "2022",
     "value": 45.7
    },
    {
     "period": "2023",
     "value": 46.3
    },
    {
     "period": "2024",
     "value": 46.6
    },
    {
     "period": "2025",
     "value": 46.0
    }
   ]
  },
  {
   "key": "CBS|85541NED|NL|%|Kenmerken=T009002,Marges=MW00000,topic=Totaal_33",
   "dataset_code": "85541NED",
   "source_org": "CBS",
   "unit_code": "%",
   "unit_label": "%",
   "dimensions": {
    "Marges": "MW00000",
    "Kenmerken": "T009002",
    "topic": "Totaal_33"
   },
   "frequency": "A",
   "points": [
    {
     "period": "2012",
     "value": 50.5
    },
    {
     "period": "2013",
     "value": 49.1
    },
    {
     "period": "2014",
     "value": 48.0
    },
    {
     "period": "2015",
     "value": 48.7
    },
    {
     "period": "2016",
     "value": 49.7
    },
    {
     "period": "2017",
     "value": 48.5
    },
    {
     "period": "2018",
     "value": 47.6
    },
    {
     "period": "2019",
     "value": 46.7
    },
    {
     "period": "2020",
     "value": 43.8
    },
    {
     "period": "2021",
     "value": 38.9
    },
    {
     "period": "2022",
     "value": 41.2
    },
    {
     "period": "2023",
     "value": 48.7
    },
    {
     "period": "2024",
     "value": 49.5
    },
    {
     "period": "2025",
     "value": 47.0
    }
   ]
  }
 ],
 "peers": [],
 "derived": [],
 "trend": {
  "direction": "flat",
  "method": "OLS over last 8 annual observations, 5% significance (MBW convention)",
  "window_start": "2018",
  "window_end": "2025",
  "slope_per_year": 0.319048
 },
 "deltas": {
  "y1": -2.5,
  "y5": 3.2,
  "y10": -1.7,
  "latest_period": "2025",
  "latest_value": 47.0
 },
 "revisions_since": "2026-07-09",
 "generated_at": "2026-09-04T08:06:56+00:00"
}