[{"Year":1990,"PR Citations":353},{"Year":1991,"PR Citations":371},{"Year":1992,"PR Citations":573},{"Year":1993,"PR Citations":298},{"Year":1994,"PR Citations":155},{"Year":1995,"PR Citations":252},{"Year":1996,"PR Citations":46},{"Year":1997,"PR Citations":152},{"Year":1998,"PR Citations":921},{"Year":1999,"PR Citations":42},{"Year":2000,"PR Citations":681},{"Year":2001,"PR Citations":307},{"Year":2002,"PR Citations":454}]