Source: The Ocean Conservancy Year 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 Total 66 142 111 64 45 82 111 131 277 150 284 355 101 219 Six-Pack Ring 3 6 4 7 5 3 4 7 10 21 16 26 5 6