Year	base year varies by country
1987	0.008653064041544433
1988	0.008490619510385348
1989	0.009083776795251769
1990	0.009808271473616298
1991	0.023027033283006048
1992	0.21417741235742407
1993	1.829991686902126
1994	5.139987868085677
1995	7.300380755477373
1996	9.880547602730665
1997	11.78843672546244
1998	12.858532809972356
1999	17.6900545659648
2000	22.494980847603205
2001	24.144531979164718
2002	24.633530121116447
2003	25.612605154483454
2004	26.921074977226926
2005	28.840176723256956
2006	31.548735892416424
2007	36.24210006244717
2008	44.29364081235897
2009	46.08102381049131
2010	50.70474929078678
2011	62.10411103701029
2012	67.4800396396702
2013	69.62265785250592
2014	75.48156146547817
2015	78.06853158857037
2016	82.79211826741617
2017	88.03049635295166
2018	91.06529939996747
2019	100
2020	105.34018553508729
2021	122.18702854006335
2022	146.20568004725408
2023	165.82025600549747