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:
| Sport | Competition name | Competing entities | Age groups | Held every |
| --- | --- | --- | --- | --- |
| Aquatics | FINA World Junior Swimming Championships | Individuals [R ] | 17 or younger | Two years |
| Athletics | IAAF World Junior Championships in Athletics | Individuals [R ] | 18-19 | Two years |
| Athletics | IAAF World Youth Championships in Athletics | Individuals [R ] | 17 or younger | Two years |
| Badminton | BWF World Junior Championships | Individuals [D ] | 19 or younger | One year |
| Bandy | Bandy World Championship U-23 | Nations | Under-23 | Two years |
| Bandy | Bandy World Championship U-19 | Nations | Under-19 | Two years |
| Bandy | Bandy World Championship U-17 | Nations | Under-17 | Two years |
| Bandy | Bandy World Championship U-15 | Nations | Under-15 | Two years |
| Baseball | World Junior Baseball Championship | Nations | Under-18 | One year through 2000, now two years |
| Baseball | World Youth Baseball Championship | Nations | Under-16 | One year through 1998, two years starting in 2001 |
| Baseball | Big League World Series | Communities | 16-18 | One year |
| Baseball | Senior League World Series | Communities | 14-16 | One year |
| Baseball | Junior League World Series | Communities | 13-15 | One year |
| Baseball | Little League World Series | Communities | 13 or younger | One year |
| Basketball | FIBA Under-21 World Championship | Nations | 21 or younger | Four years until 2005 |
| Basketball | FIBA Under-19 World Championship | Nations | 19 or younger | Four years until 2007, now two years |
| Basketball | FIBA Under-17 World Championship | Nations | 17 or younger | Two years |
| Basketball | FIBA 3x3 U-18 World Championships | Nations | 18 or younger | Year |
| Cricket | U-19 Cricket World Cup | Nations | 19 or younger | Two years |
| Figure skating | World Junior Figure Skating Championships | Individuals | 13-19 | One year |
| Football (soccer) | FIFA U-20 World Cup | Nations | 20 or younger | Two years |
| Football (soccer) | FIFA U-17 World Cup | Nations | 17 or younger | Two years |
| Ice hockey | IIHF World U20 Championship | Nations | 20 or younger | Year |
| Ice hockey | IIHF World U18 Championships | Nations | 18 or younger | Year |
| Lacrosse | Under-19 World Lacrosse Championships | Nations | 19 or younger | Four years |
| Rowing | Junior World Rowing Championships | Nations | 18 or younger | Year |
| Rugby union | IRB Junior World Championship | Nations | 20 or younger | Year |
| Rugby union | Under 19 Rugby World Championship | Nations | 19 or younger | Year |
| Rugby union | Under 21 Rugby World Championship | Nations | 21 or younger | Year |
| Speed skating | World Junior Speed Skating Championships | Individuals and Nations | 19 or younger | One year |
| Speed skating | ISU Junior World Cup Speed Skating | Individuals and Nations | 19 or younger | One year |
| Sailing | ISAF Youth Sailing World Championships | Nations | Under 19's | annually |
| Sailing | ISAF Classes World Championship | Held in the Optimist, Splash, Zoom, RS Tera etc. | 19 or younger | Various |
| Table tennis | World Junior Table Tennis Championships | Individuals [D ] and Nations | 18 or younger | One year |
| Volleyball | Men's Junior Volleyball World Championship | Nations | 21 or younger | Two years |
| Volleyball | Boys Youth Volleyball World Championship | Nations | 19 or younger | Two years |
Question:
What are the age groups for the Big League World Series?
Answer:
16-18