{
  "not_actual_ECB_data": true,
  "index_values": [
    "100",
    "110",
    "99",
    "108.9"
  ],
  "period_A_indices": [
    0,
    1
  ],
  "period_B_indices": [
    2,
    3
  ],
  "within_period_simple_changes_pct": [
    10,
    10
  ],
  "full_simple_changes_pct": [
    10,
    -10,
    10
  ],
  "within_period_maximum_declines_pct": [
    0,
    0
  ],
  "full_maximum_decline_pct": 10
}