Year	PB	PW	PS	PM	QB	QW	QS	QM
1988	2.819	6.19	30.578	-	141.4	25.82	3.993	0.6467
1989	2.928	6.607	33.315	-	141.6	24.32	4.048	0.7049
1990	3.116	6.801	36.601	577	139.9	22.85	3.87	0.7652
1991	3.271	6.883	39.064	547	134.9	23.01	3.614	0.8278
1992	3.361	7.056	40.532	454	127.8	23.23	3.595	0.7695
1993	3.478	7.271	41.847	446	123.8	23.14	3.982	0.709
1994	3.583	7.597	43.044	475	122.1	23.19	4.168	0.712
1995	3.724	7.983	44.254	476	120.2	22.96	4.13	0.6913
1996	3.891	8.306	45.687	484	118.7	23.29	4.106	0.7442
1997	3.981	8.559	46.714	489	117.6	24.18	4.158	0.7575
1998	4.02	8.755	47.088	473	116.9	24.63	4.318	0.7875