Add first Grand Prix for Hockenheim

README.md

@@ -14,7 +14,7 @@ A repository of Formula 1™ circuits in [GeoJSON](http://geojson.org/) format.
 | Bahrain | [Bahrain International Circuit](circuits/bh-2002.geojson) | 2002 | 2004 | 5412m | 50.512 | 26.031 |
 | Baku | [Baku City Circuit](circuits/az-2016.geojson) | 2016 | 2016 | 6003m | 49.842 | 40.369 |
 | Barcelona | [Circuit de Barcelona-Catalunya](circuits/es-1991.geojson) | 1991 | 1991 | 4655m | 2.259 | 41.569 |
-| Hockenheim | [Hockenheimring](circuits/de-1932.geojson) | 1932 |  | 4574m | 8.572 | 49.330 |
+| Hockenheim | [Hockenheimring](circuits/de-1932.geojson) | 1932 | 1970 | 4574m | 8.572 | 49.330 |
 | Le Castelle | [Circuit Paul Ricard](circuits/fr-1969.geojson) | 1969 | 1971 | 5842m | 5.791 | 43.253 |
 | Melbourne | Albert Park Circuit | 1953 |  | 5027m | 144.970 | -37.846 |
 | Mexico City | Autódromo Hermanos Rodríguez | 1962 |  | 4304m | -99.091 | 19.402 |

f1-locations.geojson

@@ -103,6 +103,7 @@
                 "name": "Hockenheimring",
                 "location": "Hockenheim",
                 "opened": "1932",
+                "firstgp": "1970",
                 "length": "4574m",
                 "lon": "8.572",
                 "lat": "49.330",