It's a nice stat but probably decided just by a single event - Rogla's withdrawal.
Every year has some GC withdrawals though. Maybe not all as favoured as Rogla for that 4th spot, but still.
2000 - Zülle, Pantani
2001 - Moreau
2002 - Moreau, Sevilla
2003 - Beloki, Botero, Klöden, Leipheimer, Aitor González
2004 - Mayo, Heras, Zubeldia, Menchov
2005 - Klöden, Valverde, Igor González de Galdeano
2006 - Valverde, Mayo, plus all the guys that were withdrawn before the start
2007 - Rasmussen, Menchov
2008 - Cunego, Soler, Riccò
2009 - Leipheimer (admittedly few here)
2010 - Fränk Schleck, Vande Velde
2011 - Van den Broeck, Vinokourov, Horner, Klöden
2012 - Samuel Sánchez, Fränk Schleck, Hesjedal, Gesink
2013 - Van den Broeck, Pinot, Peraud
2014 - Froome, Contador, Talansky, Andy Schleck
2015 - Basso, van Garderen, Dumoulin
2016 - Contador, Dumoulin
2017 - Valverde, Thomas, Porte, Pinot
2018 - Nibali, Urán, Porte
2019 - Pinot, Fuglsang
2020 - Bernal, Bardet, Zakarin, Gaudu, Aru
2021 - Roglič, Nibali, López, Simon Yates
2022 - Roglič, Mas, O'Connor, Haig, Caruso
2023 - Carapaz, Mas, Dani Martínez, Bardet
2024 - Roglič, Vlasov, Ayuso, Bilbao
Can't that explained by the existence of more super teams? I mean I see how 2024 is an outlier, but isn't the crowding of two teams with most of the GC talent also an outlier?
It was being contested that two teams being super-OP was fairly standard and UAE-Jumbo was just a rivalry similar to USP-Telekom, Astana-Saxo or Sky-Movistar, and I was using the above to show that the gap between the super-teams and the field is way larger now than it has been in at least a generation.
And the nearest we got was still nothing like as big a gap between the haves and have-nots, and that was not coming after doing the Giro and a full Classics campaign, it was with Lance and his entire squad basing the entire year around the Tour de France and doing very little racing outside of it.