Table 1 Summary statistics on research...

Table 1

Summary statistics on research outcomes over time

	Stepping stone	Dead end	Mixed/controversial	Total
1990–1999	0	1	0	1
2000–2009	12	8	7	27
2010–2020^a	13	26	11	50

Note(s): ^aIn this time frame we also include the first two months of 2021

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