[
  {
    "year": 2018,
    "iowa_index_2018": 100,
    "us_index_2018": 100
  },
  {
    "year": 2019,
    "iowa_index_2018": 64.3,
    "us_index_2018": 106.6
  },
  {
    "year": 2020,
    "iowa_index_2018": 58.1,
    "us_index_2018": 150.2
  },
  {
    "year": 2021,
    "iowa_index_2018": 199.8,
    "us_index_2018": 210.8
  },
  {
    "year": 2022,
    "iowa_index_2018": 309.2,
    "us_index_2018": 273.2
  },
  {
    "year": 2023,
    "iowa_index_2018": 182.4,
    "us_index_2018": 211.8
  },
  {
    "year": 2024,
    "iowa_index_2018": 150.3,
    "us_index_2018": 177.4
  }
]