Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Competition | Venue | Position | Event | Notes |
| --- | --- | --- | --- | --- | --- |
| 1979 | Grandma's Marathon | Duluth, United States | 1st | Marathon | 2:37:37 |
| 1980 | Grandma's Marathon | Duluth, United States | 1st | Marathon | 2:38:35 |
| 1981 | Grandma's Marathon | Duluth, United States | 1st | Marathon | 2:29:35 |
| 1984 | Boston Marathon | Boston, United States | 1st | Marathon | 2:29:28 |
| 1984 | Olympic Games | Los Angeles, United States | 5th | Marathon | 2:28:54 |
| 1986 | Osaka Ladies Marathon | Osaka, Japan | 1st | Marathon | 2:30:24 |
| 1986 | Commonwealth Games | Edinburgh, Scotland | 2nd | Marathon | 2:28:17 |
| 1987 | Osaka Ladies Marathon | Osaka, Japan | 1st | Marathon | 2:30:40 |
| 1987 | World Championships | Rome, Italy | 21st | 10,000 m | 34:07.26 |
| 1988 | Olympic Games | Seoul, South Korea | 33rd | Marathon | 2:37:52 |
| 1989 | Osaka Ladies Marathon | Osaka, Japan | 1st | Marathon | 2:30:21 |
| 1989 | Hokkaido Marathon | Sapporo, Japan | 1st | Marathon | 2:36:39 |
| 1991 | Hokkaido Marathon | Sapporo, Japan | 1st | Marathon | 2:33:20 |
| 1992 | Olympic Games | Barcelona, Spain | 3rd | Marathon | 2:33:59 |
| 1996 | Olympic Games | Atlanta, United States | 46th | Marathon | 2:42:21 |
Question:
what were the total number of times the venue was located in the united states?
Answer:
6