just another inlet to tributary

config.json

{"endpoint":"","display":"svg","public":true,"require":[],"tab":"edit","display_percent":0.7,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01}

inlet.js

var svg = d3.select("svg");

population.json

[
  {
    "year": 1790,
    "population": 3929214
  },
  {
    "year": 1800,
    "population": 5236631
  },
  {
    "year": 1810,
    "population": 7239881
  },
  {
    "year": 1820,
    "population": 9638453
  },
  {
    "year": 1830,
    "population": 12866020
  },
  {
    "year": 1840,
    "population": 17069453
  },
  {
    "year": 1850,
    "population": 23191876
  },
  {
    "year": 1860,
    "population": 31443321
  },
  {
    "year": 1870,
    "population": 38558371
  },
  {
    "year": 1880,
    "population": 49371340
  },
  {
    "year": 1890,
    "population": 62979766
  },
  {
    "year": 1900,
    "population": 76212168
  },
  {
    "year": 1910,
    "population": 92228496
  },
  {
    "year": 1920,
    "population": 106021537
  },
  {
    "year": 1930,
    "population": 123202624
  },
  {
    "year": 1940,
    "population": 132164569
  },
  {
    "year": 1950,
    "population": 151325798
  },
  {
    "year": 1960,
    "population": 179323175
  },
  {
    "year": 1970,
    "population": 203211926
  },
  {
    "year": 1980,
    "population": 226545805
  },
  {
    "year": 1990,
    "population": 248709873
  },
  {
    "year": 2000,
    "population": 281421906
  },
  {
    "year": 2010,
    "population": 308745538
  }
]

style.css

.axis path, line {
  stroke: LightGrey;
}
.axis text {
  fill: SteelBlue;
}
path {
  fill: none;
}
circle {
  opacity: 0.6;
  fill: DarkGreen;
}