Update index.html

index.html

@@ -220,7 +220,7 @@ <h1><a href="/population-calculator/">Population calculator</a></h1>
     <div id="controls">
       <div><label for="birth_rate">Total fertility rate <span data-for="birth_rate" id="birth_rate_v"></span></label> <input class="vars" type="range" min="0" max="10" step="0.01" id="birth_rate"></div>
       <div>Growth rate (yearly) <span data-for="growth_rate" id="growth_rate"></span></div>
-      <div><label for="immigration">immigration/year <span data-for="immigration" id="immigration_v"></span></label> <input class="vars" type="range" min="0" max="100000" step="100" id="immigration"></div>
+      <div><label for="immigration">Immigration/year <span data-for="immigration" id="immigration_v"></span></label> <input class="vars" type="range" min="0" max="100000" step="100" id="immigration"></div>
       <div><label for="start_pop">Starting population <span data-for="start_pop" id="start_pop_v"></span></label> <input class="vars" type="range" min="0" max="10000000" step="1000" id="start_pop" value=""></div>
       <div><label for="birth_age">First birth given (age) <span data-for="birth_age" id="birth_age_v"></span></label> <input class="vars" type="range" min="16" max="40" step="1" id="birth_age" value=""></div>
       <div><label for="human_age">Human age (average) <span data-for="human_age" id="human_age_v"></span></label> <input class="vars" type="range" min="30" max="1000" step="1" id="human_age" value=""></div>